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Q1.An atom of calcium, , is ionised by removing two electrons.(i) State the number of protons, neutrons and electrons in the ion formed.protons............................................neutrons...........................................electrons..........................................(3)(ii) Calculate the charge of the ion.charge ........................................... C(1)(iii) Calculate the specific charge of the ion.specific charge ................................... C kg−1(2)(Total 6 marks)Q2. (a) The nucleus of a particular atom has a nucleon number of 14 and a proton number of 6.(i) State what is meant by nucleon number and proton number.nucleon number ..................................................................................................................................................................................................................................................................................................................proton number ....................................................................................................................................................................................................................................................................................................................(1)(ii) Calculate the number of neutrons in the nucleus of this atom. answer = .....................................(1)Page 1 of 6
(iii) Calculate the specific charge of the nucleus. answer = .......................... Ckg–1(3)(b) The specific charge of the nucleus of another isotope of the element is 4.8 × 107 Ckg–1.(i) State what is meant by an isotope..............................................................................................................................................................................................................................................................................................................................................(2)(ii) Calculate the number of neutrons in this isotope. answer = .....................................(3)(Total 10 marks)Q3. (a) State what is meant by the specific charge of a nucleus and give an appropriate unit for this quantity................................................................................................................................................................................................................................................................................................................................................................................................................................................................................................. unit: ...................................................(2)Page 2 of 6
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