Uncategorized Atomic Structure – MCQ QUIZ April 25, 2020April 25, 2020 Shveta 0 Comments myp ib, O level Chemistry Deduce the number of protons , neutrons and electrons in an atom of Uranium - 235. Refer to periodic table for any other information you need. Protons - 143, Electrons - 92, Neutrons - 92Protons - 92, Electrons - 143, Neutrons - 143Protons - 92, Electrons - 92, Neutrons - 143Protons - 92, Electrons - 92, Neutrons - 922. The total number of protons and electrons in an Element X is 30. What is the proton number of element X?1515.51616.53. Element Y has a proton number of 7. It also has seven neutrons. What is the number of electrons in an atom of Y and the nucleon number of Y respectively?14, 77, 147, 2114, 144. Choose the wrong statement about properties of electrons, protons and neutrons.Electrons, protons and neutrons are sub-atomic particles. All the sub - atomic particles are charged.Electron is the lightest sub- atomic particle. Proton has a positive charge.5. Which definition of isotopes is correct?Isotopes are atoms of the same element with different number of electrons.Isotopes are atoms of the same element with different number of neutrons.Isotopes are atoms of the same element with the same number of neutrons and different number of protons.Isotopes are atoms with the same physical properties and different chemical properties.6. Which statement is true?Argon atom has more electrons than Chloride ion.Chloride ion has more electrons than Potassium ion. Iron(III) ion has more electrons than Iron(II) ion.Potassium atom has more electrons than Potassium ion.7. In which compound does one of the atoms not achieve the electronic configuration 2, 8?Carbon tetrachlorideCarbon di - oxideMagnesium oxideSodium oxide8. An element R has p protons and n neutrons in its nucleus. Which row gives a possible correct number of protons, electrons and neutrons in a negative ion of an isotope of R?protons - p, neutrons - n + 1, electrons - p + 1protons - p, neutrons - n + 1, electrons - p - 1protons - p + 1, neutrons - n , electrons - p + 1protons - p + 1, neutrons - n, electrons - p - 19. An isotope of element X has 40 nucleons and 19 protons. What is element X?ArgonCalciumCobaltPotassium10. Which element has the greatest number of electrons in the outermost shell of the atoms?FluorineHeliumLithiumPotassium11. The atoms of element Y have the electronic configuration 2,8,6. Which statement about element Y is correct?It forms an ionic compound with sodium.It forms an ion with a charge of 2+. It has 6 protons in the outer shell of an atom.It only reacts with non - metals.12. Which statement about an atom is correct?Each element has only one nucleon ( mass) number.The nucleon number can be less than the proton number.The nucleon number can equal the proton number.The number of neutrons never equals the number of electrons.13. Uranium occurs naturally as three isotopes - Uranium - 234, Uranium - 235, Uranium - 238. Which statement about them is wrong?All have same number of protonsAll have same number of neutronsAll have same number of electronsThey have similar chemical properties.14. Chlorine - 35 is an isotope of Chlorine. Determine the number of electrons, protons and neutrons in an atom of Chlorine.Electrons - 17, Protons - 17, Neutrons - 18Electrons - 18, Protons - 18, Neutrons - 18Electrons - 17, Protons - 17, Neutrons - 17Electrons - 35, Protons - 35, Neutrons - 1715. An ion of Chlorine - 37 contains the following particles- X - 20, Y - 18, Z - 17. Identify particles X, Y and Z.X - proton, Y - electron, Z - neutronX - proton, Y - neutron, Z - electronX - neutron, Y - electron, Z - protonX - neutron, Y - proton, Z - electron16. What is the number obtained when the proton number is subtracted from the nucleon number?Number of neutrons in the nucleusNumber of protons and electrons in the atom. Number of protons and neutrons in the atom.Number of protons in the nucleus.17. The diagram below shows the nucleus of an atom. Which atom is it ? NitrogenLithiumBerylliumPotassium18. The mass number of Chlorine is 35.5 . Which statement explains why it is not a whole number?Chlorine consists of two stable isotopes , Cl - 35 and Cl - 37 with different percentage distribution in the nature The number of protons is 18 and number of neutrons is 17 The number of protons is 17 and number of neutrons is 18 It cannot be explained.19. An atom has an electronic configuration of 2,8,4 and a nucleon number of 28. How many electrons, protons and neutrons are present in it?electron - 28, proton - 28, neutron - 14 electron - 14, proton - 14, neutron - 14 electron - 14, proton - 14, neutron - 28electron - 28, proton - 28, neutron - 28 20. Which relationship is wrong for an atom?Number of electrons = Number of neutronsNucleon number = no. of protons + no. of neutronsAtomic number = Number of protonsMass number = No. of protons + No. of neutrons21. Which statement is false?Electrons move around the nucleus in regions called electron shells whereas neutrons and protons are present inside the nucleus. Proton has a positive charge, electron has a negative charge and there is no charge on neutron. The relative atomic mass of Proton and Electron is 1 whereas Electron is 1/1840None of the above
