There are four elements P, Q, R and S having atomic numbers of 4, 18, 10 and 16 respectively. The element which can exhibit covalency as well as electrovalency will be :
(a) P
(b) Q
(c) R
(d) S
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Solution
(d) S
Element S has electronic configuration 2, 8, 6. It can exhibit covalency as well as electrovalency.