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The electronic structure of the atoms of live elements,A,B,C,D and E, are shown below:
A 2,8,2 B 2,8,6 C 2,1 D 2,8 E 2,6
(a) which one of these elements is in group II of the periodic table? Give a reason for your answer.
(b) which two of these elements are in the same group in the periodic table?
(c) which one of these elements has the highest proton number?
(d) Element E is oxygen. An isotope of oxygen has eight neutrons. (i) what do you understand by the term isotope? (ii) state the nucleon number of this isotope of oxygen.
(e) Element C is Lithium is a metal. Describe three differences between the physical properties of lithium and oxygen 2 of 2
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