1. Atomic structure
A section of Chemistry, 9701
Listing 10 of 359 questions
Complete the table to show the composition and identity of some atoms and ions. name of element nucleon number atomic number number of protons number of neutrons number of electrons overall charge lithium +1 oxygen Beams of protons, neutrons and electrons behave differently in an electric field due to their differing properties. The diagram shows the path of a beam of electrons in an electric field. Add and label lines to represent the paths of beams of protons and neutrons in the same field. electron beam The fifth to eighth ionisation energies of three elements in the third period of the Periodic Table are given. The symbols used for reference are not the actual symbols of the elements. ionisation energies, kJ mol–1 fifth sixth seventh eighth X 21 269 25 398 29 855 Y 27 107 31 671 Z 11 018 33 606 State and explain the group number of element Y. group number explanation State and explain the general trend in first ionisation energies across the third period. Explain why the first ionisation energy of element Y is less than that of element X. Complete the electronic configuration of element Z. 1s2 A sample of strontium exists as a mixture of four isotopes. Information about three of these isotopes is given in the table. mass number abundance 9.86% 7.00% 82.58% Calculate the abundance of the fourth isotope. abundance = % The relative atomic mass of this sample of strontium is 87.71. Calculate the mass number of the fourth isotope. mass number =
9701_s16_qp_21
THEORY
2016
Paper 2, Variant 1
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Complete the table to show the composition and identity of some atoms and ions. name of element nucleon number atomic number number of protons number of neutrons number of electrons overall charge boron nitrogen +1 The fifth to eighth ionisation energies of three elements in the third period of the Periodic Table are given. The symbols used for reference are not the actual symbols of the elements. ionisation energies, kJ mol–1 fifth sixth seventh eighth X 27 107 31 671 Y 11 018 33 606 Z 11 996 13 842 State and explain the group number of element Y. group number explanation State and explain the general trend in first ionisation energies across the third period. Complete the electronic configuration of element X. 1s2 A sample of oxygen exists as a mixture of three isotopes. Information about two of these isotopes is given in the table. mass number abundance 99.76% 0.04% Calculate the abundance of the third isotope. abundance = % The relative atomic mass of this sample of oxygen is 16.0044. Calculate the mass number of the third isotope. You must show your working. mass number =
9701_s16_qp_22
THEORY
2016
Paper 2, Variant 2
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Questions Discovered
359