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08/10/2021 7:27 pm
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Consider the following elements :
20Ca, 8O, 18Ar, 16S, 4Be, 2He
Which of the above elements would you expect to be:
(i) very stable?
(ii) in group 2 of the periodic table?
(iii) in group 16 of the periodic table?
1 Answer
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08/10/2021 7:29 pm
(i) 18Ar and 2He (Noble gases).
(ii) 20Ca and 4Be (no. of valence electrons in each = 2).
(iii) 8O and 16S (no. of valence electrons in each = 6).