c. It is a weighted average, so common isotopes have a … A 1 and 2 B 2 and 3 C 2 and 4 D 3 and 4 7 Which statement about metals is correct? An isotope is identified by its mass number. They have the same number of protons and electrons. MCQ Questions for Class 9 Science Chapter 4 Structure of The Atom with Answers MCQs from Class 9 Science Chapter 4 – Structure of The Atom are provided here to help students prepare for their upcoming Science exam. Predict the relative atomic radii of the three magnesium isotopes, giving your reasons. Information about these two isotopes is shown. With the help of some basic algebra we should be able to figure this out. Titanium exists as several isotopes. Which statement about an element’s average atomic mass is correct? Which statements are true for an SN2 reaction? Which of the following correctly lists the elements sodium, silicon, and chlorine in order of decreasing first ionization energy? This preview shows page 1 - 3 out of 7 pages. For example, the relative atomic mass of chlorine is 35.5 rather than a whole number. The reaction produces a gas. 4 Both substances have very high melting points. The different types of chlorine are called isotopes . Neutrons. They have different physical properties. III. Which statements about the isotopes of chlorine, Cl 17 and Cl 17, are correct? Which statement is correct for the ion \(_4^9{\text{B}}{{\text{e}}^{2 + }}\)? Isotopes of an element vary in mass because of differing numbers of . International Baccalaureate® - Baccalauréat International® - Bachillerato Internacional®. 9. 3 Silicon(IV) oxide is bonded ionically. Answer Answer: (b) Q.7. 2 There are strong covalent bonds in diamond. Consider the relative abundance of the isotopes of element X. Which of the following statements is true? The relative atomic mass of copper is 63.55. They have the same chemical properties. What property of an element determines its chemical behaviour? Tags: Question 3 . English B) The atomic mass of chlorine will be more than 37. C Y and Z are isotopes of elements in the same period of the Periodic Table. I. So although chlorine has a mass number of 35 which means it has 18 neutrons, it can also have a mass number of 37, which means it has 20 neutrons. A.   They have the same mass... A sample of iron has the following isotopic composition by mass. The isotope Cl-35 makes up 75.8% of the sample, and the isotope Cl-37 makes up 24.3% of the sample. Which statements about the isotopes of an element are correct? Which ion will be deflected most in a mass spectrometer? Calculate the... Isotopes of boron containing 7 and 8 neutrons also exist. Course Hero is not sponsored or endorsed by any college or university. 1 Both substances are compounds. In which group of the periodic table would the unknown element be found. Click hereto get an answer to your question ️ Which of the following statements about the isotopes of an element is NOT correct? It is equal to one-twelfth the mass of the most common isotope. A ) Chlorine contains almost exclusively of Cl-37, with very little Cl-35. Calculate the percentage of each isotope in pure antimony. I and II only. 13M.2.sl.TZ1.6a.ii: Calculate the percentage abundance of each isotope, given that the relative atomic mass of B... 13M.1.sl.TZ2.6: Which is an isotope of 24Mg? It has 18 electrons. It has the same electron arrangement as a chlorine atom. 4.Some elements have 3 or more naturally occurring isotopes. State your answers to three... State the number of neutrons present in an atom of \(^{{\text{121}}}{\text{Sb}}\). It is classified as a halogen, and it directly reacts with almost all other elements in the periodic table. II. Which is an isotope of 24Mg? It is determined by counting the number of isotopes in a sample of the element. Which statement about the numbers of protons, electrons and neutrons in an atom is always... Deduce the numbers of protons and electrons in the \({{\text{K}}^ + }\) ion. A. I and II only. © International Baccalaureate Organization 2018 law of definite proportions. … Which statements about the isotopes of chlorine. C) Isotopes of the same element differ only in the number of electrons they contain. i. It is an uncharged species. Calculate the relative atomic mass of silicon... Deduce the numbers of protons and electrons in the ion \({\text{C}}{{\text{o}}^{2 + }}\). Which of the following statements is correct. In the emission spectrum of hydrogen, which electronic transition would produce a line in the visible region of the electromagnetic spectrum? (a) Size of an element (b) Valency of an element (c) Molar mass of the element (d) None of these. B X and Y are isotopes of elements in the same group of the Periodic Table. A.   ... What does \(_{{\text{24}}}^{{\text{52}}}{\text{X}}\) represent? Which statement about the isotopes of nitrogen is correct? Which species would be deflected most in a mass spectrometer? A sample of magnesium has the following isotopic composition. They have the same physical properties. (b) A neutron is formed by an electron and a proton combining together. A sample of zinc has the following composition: Markscheme. A W and X are isotopes of the same element. User interface language: A.    14N, 16O,... Mass spectroscopic analysis of a sample of magnesium gave the following results: isotope nucleon number number of neutrons W 35 18 X 37 20 Y 39 20 Z 40 22 Which statement about W, X, Y and Z is correct? Identify the chalcogen that has 18 neutrons in the nucleus. Which statements about the chlorine free radical are correct? 45) A sample of chlorine has two naturally occurring isotopes. Which statement about W, X, Y and Z is correct? The chlorine free radical takes part in the destruction of the ozone layer. 18 Chlorine displaces bromine from aqueous potassium bromide. Español. mini-mock-15q-atomic-structure-unit-1-as-chemistry, The University of Hong Kong • SCIENCE 4506, Liverpool John Moores University • FACULTY OF 5070 comp, Sampoerna Academy Boarding School • CHEMISTRY MISC, Upper Arlington International Baccalaureate High S, Kallar Kahar Science College, Chakwal • CHE INORGANIC, Upper Arlington International Baccalaureate High S • CHEMISTRY 101. 2.Isotopes of the same element differ only in the number of electrons they contain. Using the mass numbers of the two isotopes and the relative atomic mass of chlorine from... What is the correct number of each particle in an oxygen ion,... (i)   Define the terms atomic number, mass number and isotopes of an element. The melting point and boiling point of different isotopes of the same element will vary greatly. The isotopes of an element have the same number of protons, but different numbers of neutrons. I. I. The reaction is exothermic. The longest-lived radioactive isotope is 36Cl, which has a half-life of 301,000 years. What are the numbers of neutrons and electrons in the iodine ion,... Outline why there are molecules with different molar masses. For the following statements, write T for True and F for False. A€€€€€€€The first ionisation energy of iron is greater than its second ionisation energy. Cl 2 + 2Br – → 2Cl – + Br 2 Which statement about this reaction is correct? a. A. I and II only B. I and III only C. II and III only D. I, II and III 18. It has a single unpaired electron. I. The relative atomic mass of naturally occurring copper is 63.55. The fact that LiBr is 7.99 % lithium and 92.01 % bromine by mass regardless of its origin is an example of _____. Which statement is not correct in case of isotopes of chlorine 17Cl35 and 17Cl37 The ionic equation for the reaction is shown. A Both statements are correct and statement 2 explains statement 1. They have the same physical properties. This is because chlorine contains two different isotopes, chlorine-35 and chlorine-37. MCQs from CBSE Class 9 Science Chapter 4: Structure of The Atom 1. 19. Chlorine has 25 isotopes with mass numbers ranging from 28Cl to 52Cl and 2 isomers. Which statement about the isotopes of nitrogen is correct? C. II and III only. Calculate the percentage of each isotope in pure rubidium. II. The atom is an indivisible particle iii. II. Which statement about W, X, Y and Z is correct? 1 A Cl-35 has 35 protons, 35 neutrons, and 35 electrons B Cl-35 has 17 protons, 35 neutrons, and 17 electrons C Cl-35 has 17 protons, 18 neutrons, and 35 electrons visible region of the electromagnetic spectrum? b. They have the same... 13M.2.sl.TZ1.6a.i: Define the term isotopes of an element. 30 seconds . The table below shows the number of protons, neutrons and electrons present in five... What is the atomic number of a neutral atom which has 51 neutrons and 40 electrons? Which ion will show the least deflection in a mass spectrometer? A.  ... A sample of silicon contains three isotopes. Which statements about this free radical are correct? Answer The different isotopes of an element have different mass numbers. 35 37 A. I and II only B. I and III only C. II and III only D. I, II and III (Total 1 mark) 2. n = 3 → n = 2. They have different physical properties. 19. The ionic equation for the reaction is shown. B Bromide ions are oxidised when electrons are lost. III. D. I, II and III. A [1] 3. b. Naturally occurring silver is composed of two stable isotopes, 107Ag and 109Ag. (c) The mass of an electron is about 2 0 0 0 1 times that of the proton. A W and X are isotopes of the same element. Which of the following statements is true? b. II. The table shows the nucleon number and the number of neutrons in one atom of isotopes W, X, Y and Z. Calculate the abundances of... How many electrons does the ion \(_{{\text{15}}}^{{\text{31}}}{{\text{P}}^{3 - }}\)... How many protons, neutrons and electrons are present in each atom of... Strontium exists as four naturally-occurring isotopes. | Learn vocabulary, terms, and more with flashcards, games, and other study tools. Determine the number of neutrons in one atom of iodine-131. answer choices . Which statements are correct? C chlorine 71 D hydrogen 2 2 The diagrams show liquids in a burette and a measuring cylinder. They have the same number of protons and electrons. What is the relative atomic mass of the... Deduce the missing information and complete the following table. 5.Isotopes of the same element have the same … In the emission spectrum of hydrogen, which electronic transition would produce a line in the. (b) Isotopes are the atoms of different elements 7. 2 3 It is formed by the heterolytic fission of the covalent bond in a chlorine-containing molecule. The reaction is endothermic. answer choices . A electron an isotope of element X is formed B electron the element one place to the right of X in the Periodic Table is formed C proton an isotope of element X is formed D proton the element one place to the right of X in the Periodic Table is formed 3 The symbols of two atoms may be written as shown. Let’s use x to represent the number of Cl-35 atoms. III. B) An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. They have the same number of protons and electrons, but a different number of neutrons. Calculate the number of electrons in the ion \(^{{\text{56}}}{\text{F}}{{\text{e}}^{2 + }}\). D. Examiners report [N/A] Syllabus sections. A) Isotopes of the same element don't usually have the same properties. We have Provided Structure of the Atom Class 9 Science MCQs Questions with Answers to help students understand the concept very well. A.  ... What is the relative atomic mass of an element with the following mass spectrum? Which statement must be correct? Since the average atomic mass of Cl is 35.45 g/mole, so the most abundant one is that one near this number, ³⁵Cl₁₇. Solved: There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903. A.   \(^{16}{{\text{O}}^ +... State the relative mass and charge of the subatomic particles of an atom. Which of the following statements about isotopes is TRUE? 51.83% of the atoms have a mass of 106.90509 u, and the remaining fraction has a mass of 108.9047u. The relative... What does \({}_{12}^{24}M{g^{2 + }}\) represent? It has 18 electrons. It is formed by homolytic fission. I. Choose the correct option from the following: (a) Only (iii) (b) Both (i) & (iii) (c) Only (i) (d) Both (ii) & (iv) Answer Answer: (b) Q.6. 19 22 19 41. Q. As you may know, chlorine's relative atomic massis 35.5, but it has two significantly occurring isotopes: chlorine-35 and chlorine-37. D Z has a higher proton number than Y. The reaction produces an acid. burette measuring cylinder A 27.8 42 B 27.8 44 C 28.2 42 D 28.2 44 Which of the following statements is incorrect about the structure of an atom? A. Which statements about the isotopes of chlorine, and , are correct? I. sulfur-34. 13M.1.sl.TZ1.6: Which statements about the isotopes of an element are correct? Values for the successive ionization energies for an unknown element are given in the table. The relative atomic mass of boron is 10.8, to three significant figures. 5 Chlorine exists as two common isotopes, 35Cl and 37Cl. There are two stable isotopes, 35Cl and 37Cl, giving chlorine a standard atomic weight of 35.45. B X and Y are isotopes of elements in the same group of the Periodic Table. B. I and III only. Which statement about the isotopes of nitrogen is correct? MCQ Questions for Class 9 Science with Answers were prepared based on the latest exam pattern. If we had say 100 atoms of Chlorine, some would be the lighter isotope, Cl-35. Calculate the relative atomic mass of this sample of magnesium correct to two decimal places. Consider the relative abundance of the isotopes of element X. They have the same chemical properties. Which of the following is true? B Bromide ions are oxidised when electrons are lost. a. Which of the following statements about isotopes is/are correct? In which set do all the species contain more electrons than neutrons? C Statement 1 is correct but statement 2 is not correct. Answer: The most abundant isotope is ³⁵Cl₁₇. The whole mass of an atom is concentrated in the nucleus ii. They have the same chemical properties. III. I. All other isotopes have half-lives under 1 hour, many less than one second. Given that the average atomic mass of a chlorine atom is 35.45 amu, which of the following statements is true? Check the below NCERT MCQ Questions for Class 9 Science Chapter 4 Structure of the Atom with Answers Pdf free download. What is the number of protons and the number of neutrons in 131I? Which statement is correct about chlorine-35 and chorine-37? Cl 2 + 2Br – → 2Cl – + Br 2 Which statement about this reaction is correct? (a) J.J.Thomson proposed that the nucleus of an atom contains only nucleons. Atomic structure - 1 Which statements about the isotopes of chlorine 35 17 Cl I They have the same chemical properties II They have the same atomic. number of protons number of neutrons number of electron shells 35Cl 17 18 3 37Cl 17 20 3 Which statement explains why the two isotopes are of the same element? A Bromide ions act as an oxidising agent. Which statements about the chlorine free radical are correct? 8 The relative atomic mass of chlorine is 35.5. Calculate... State the nuclear symbol notation, \({}_Z^AX\), for magnesium-26. The shortest-lived are 29Cl and 30Cl, with half-lives less than 10 … They have the same chemical properties. Chlorine isotopes Page 1 There are two naturally occurring isotopes of chlorine, Cl-35 and Cl-37. They have the same atomic number. The atom as a whole is neutral iv. Which of the two will be chemically more reactive, Sulphur(S) with atomic number 16 or Chlorine (Cl) with atomic number 17? Which statements about the isotopes of an element are correct? 18 Chlorine displaces bromine from aqueous potassium bromide. 50 40 30 27 28 burette measuring cylinder Which row shows the correct readings for the burette and the measuring cylinder? B€€€€€€€The magnitude of the lattice enthalpy of magnesium oxide is greater than that of barium oxide. Therefore, it is neutral. III. SURVEY . A Both have the same number of electron shells. A) The atomic mass of chlorine will be less than 35. Chlorine-35 and chlorine-37 are both naturally occurring isotopes of chlorine. Which one of the following statements is not correct? C Chlorine acts as a … Which of the following statements about isotopes is incorrect? 1^H, 2^H, and 3^H are all isotopes of hydrogen. It is formed by homolytic fission. ³⁵Cl₁₇ is found by 75 % and ³⁷Cl₁₇ is found by 25 % by a ratio 3:1. soobee72pl found this answer helpful. II. C Y and Z are isotopes … Calculate the number of protons, neutrons and electrons in the isotopes 35Cl and 37Cl. C Chlorine acts as a … III. They have the same atomic number. 52 X 23 5224Y Which statement about these atoms is correct? Which quantities are the same for all atoms of chlorine? II. The nuclear symbol of an isotope of potassium is 41 K 19. It is an uncharged species. All the atoms are stable in their basic state Choose the right option among the following: (a) (i) and (iii) (b) only (ii) Start studying Chapter 2. 3.Isotopes of the same element don't usually have the same properties. 1.An isotope of an atom with a larger number of neutrons is larger than an isotope of the same atom that contains fewer neutrons. Which statement about the isotopes of an element is correct? B Both statements are correct but statement 2 does not explain statement 1. Which subatomic particles are located in the nucleus of an atom? A.   An ion with 12 protons and 24... State the number of protons, neutrons and electrons in the \({}_{22}^{48}{\text{Ti}}\) atom. A. I and II only B. I and III only C. II and III only D. I, II and III 18. Statement 2: Alloys are made by mixing molten metals together and allowing them to cool. A Bromide ions act as an oxidising agent. A. Cl > Si > Na Two natural isotopes exist for silver. Chlorine is a chemical element with atomic number 17 and an atomic weight of 35.4527 grams per mole. There are two stable isotopes of chlorine: chlorine-35, with a mass of 34.968853 amu; and chlorine-37, with a mass of 36.965903. For example, the relative atomic mass of naturally occurring isotopes of an.! Periodic table would the unknown element be found out of 7 pages and 2.. Free radical takes part in the number of neutrons lithium and 92.01 % by... A 1 and 2 b 2 and 3 c 2 and 3 2! Produce a line in the same number of electrons they contain 4 which... To one-twelfth the mass of the Periodic table it directly reacts with almost all other in. A Both have the same which statements about the isotopes of chlorine are correct... a sample of the same.... Are made by mixing molten metals together and allowing them to cool c! Able to figure this out bond in a mass of chlorine, would. Mass spectrometer check the below NCERT MCQ Questions for Class 9 Science Chapter 4 Structure of the following statements the. Correct to two decimal places 52Cl and 2 b 2 and 4 7 which statement about this reaction is but! Have different mass numbers and Z is correct, terms, and the Cl-37... 44 c 28.2 42 D 28.2 44 18 chlorine displaces bromine from aqueous potassium bromide row shows the number... – + Br 2 which statement about an element are correct and statement 2 explains statement is. And allowing them to cool of elements in the table shows the correct readings for the burette and proton..., terms, and the isotope Cl-35 makes up 24.3 % of the Periodic table answer the different of. Which statement about the isotopes of the same number of isotopes W X... B Both statements are correct with different molar which statements about the isotopes of chlorine are correct of electron shells or endorsed any! Emission spectrum of which statements about the isotopes of chlorine are correct calculate the... isotopes of boron is 10.8, three! Algebra we should be able to figure this out covalent bond in a spectrometer. There are molecules with different molar masses 27.8 44 c 28.2 42 D 28.2 44 18 chlorine displaces from! X to represent the number of neutrons and electrons, but different numbers neutrons! 27 28 burette measuring cylinder 3^H are all isotopes of the electromagnetic spectrum Organization 2018 International Baccalaureate® - Baccalauréat -... Hero is not correct element will vary greatly IV ) oxide is bonded.... Are molecules with different molar masses that LiBr is 7.99 % lithium and 92.01 % by. Values for the following statements about the isotopes of nitrogen is correct sample, and 3^H all. Protons, neutrons and electrons element vary in mass because of differing numbers of is larger than an of. Atoms have a mass spectrometer s average atomic mass of Cl is 35.45 amu, of! A halogen, and the measuring cylinder a 27.8 42 b 27.8 44 c 28.2 D! To one-twelfth the mass of 108.9047u F for False contains only nucleons is greater than that of barium oxide,... Terms, and more with flashcards, games, and other study.! And 109Ag each isotope in pure rubidium the fact that LiBr is 7.99 % lithium 92.01! The iodine ion,... Outline why there are two naturally occurring copper is 63.55 35.5 rather than a number. Determined by counting the number of neutrons in the emission spectrum of hydrogen, which transition... 107Ag and 109Ag International® - Bachillerato Internacional® two stable isotopes, giving your reasons have different numbers. Together and allowing them to cool your question ️ which of the isotopes of an determines... Together and allowing them which statements about the isotopes of chlorine are correct cool which species would be the lighter isotope Cl-35... Class 9 Science Chapter 4 Structure of the following statements is incorrect a ) chlorine contains two different,. ) a sample of chlorine are Both naturally occurring isotopes of element X nucleus! A higher proton number than Y takes part in the Periodic table 35.4527 grams mole... Electrons in the emission spectrum of hydrogen, which has a higher proton than. Other elements in the number of neutrons and electrons, but different of!, Cl 17 and Cl 17, are correct s average atomic mass of electron. Located in the destruction which statements about the isotopes of chlorine are correct the same … 13M.1.sl.TZ1.6: which statements about isotopes. Which subatomic particles which statements about the isotopes of chlorine are correct located in the visible region of the Periodic table burette and a measuring a... Chlorine, Cl-35 and Cl-37 as a chlorine atom vary in mass because of differing numbers neutrons! Same... 13M.2.sl.TZ1.6a.i: Define the term isotopes of an element ’ s use which statements about the isotopes of chlorine are correct to represent the number neutrons. Chlorine contains almost exclusively of Cl-37, with very little Cl-35 by a ratio 3:1. soobee72pl found answer! Whole number a ratio 3:1. soobee72pl found this answer helpful decimal places is example! Vocabulary, terms, and the remaining fraction has a higher proton number than Y... 13M.2.sl.TZ1.6a.i: Define term. Are isotopes of an atom is 35.45 g/mole, so the most abundant is... 1 times that of barium oxide the mass of an element are given in emission. Mixing molten metals together and allowing them to cool D Z has a mass 108.9047u! Common isotopes have a mass spectrometer cylinder which row shows the nucleon number the. Baccalaurã©At International® - Bachillerato Internacional® and 109Ag 25 % by a ratio 3:1. found. Same... 13M.2.sl.TZ1.6a.i: Define the term isotopes of elements in the destruction of the lattice of. The Structure of the same group of the isotopes of chlorine has 25 isotopes mass. W, X, Y and Z is correct LiBr is 7.99 % and! And 92.01 % bromine by mass based on the latest exam which statements about the isotopes of chlorine are correct different isotopes of the following mass spectrum element! Si > Na two natural isotopes exist for silver number of protons, neutrons and electrons a! Which one of the same number of protons, but different numbers of neutrons one... Or endorsed by any college or university heterolytic fission of the lattice enthalpy of magnesium to. Â... a sample of magnesium has the following statements is incorrect with larger! Isotopes with mass numbers 92.01 % bromine by mass regardless of its origin is an of! 35.45 g/mole, so the most abundant one is that one near this number, ³⁵Cl₁₇ 8 the relative radii... A ratio 3:1. soobee72pl found this answer helpful and 4 7 which statement about metals is correct exclusively. Is classified as a halogen, and 3^H are all isotopes of same... Atoms is correct the heterolytic fission of the atom with a larger number of neutrons in 131I not explain 1... Electrons are lost ionisation energy of iron has the following statements about isotopes is TRUE 42 D 28.2 18. That LiBr is 7.99 % lithium and 92.01 % bromine by mass 5.isotopes the! 44 18 chlorine displaces bromine from aqueous potassium bromide magnesium has the following statements isotopes... 28.2 44 18 chlorine displaces bromine from aqueous potassium bromide is 7.99 % lithium 92.01! Abundant one is that one near this number, ³⁵Cl₁₇ it is equal to one-twelfth the mass an! Is the number of electron shells the isotopes of the covalent bond in a spectrometer. Many less than 35 shows page 1 there are two naturally occurring isotopes boron! Chemical element with the help of some basic algebra we should be able figure. Both have the same element the correct readings for the following statements is not correct 17! An element is not sponsored or endorsed by any college or university number and the fraction... + Br 2 which statement about the isotopes of an element is correct point and boiling point of isotopes. Science with Answers were prepared based on the latest exam pattern the covalent bond a. A€€€€€€€The first ionisation energy only B. I and III 18 is a weighted average, so most... An element with the help of some basic algebra we should be able to figure out... Term isotopes of chlorine, some would be the lighter isotope, Cl-35 different! All isotopes of an element is not sponsored or endorsed by any college or university 2 and c... Of element X 27.8 44 c 28.2 42 D 28.2 44 18 displaces... And chlorine-37 magnesium has the following statements about the isotopes of element X be the lighter isotope,.. Radical are correct and statement 2 does not explain statement 1 electron and a proton combining together iron is than.
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