. The atomic number of an element is 16. Predict
(i) the number of valence electrons in its atom;
(ii) its valencies;
(iii) its group number;
(iv) whether it is a metal or non-metal;
(v) the nature is oxide formed by it;
(vi) the formula of it chloride;
Ans. Electronic configuration: 2, 8, 6
k l m
(i) Number of valence electrons in its atom = 6
(ii) Valency = 2
(iii) Group number = 16
(iv) It is a no-metal.
(v) The nature of oxide formed by it would be acidic.
(vi) Let this element be represented by t5he symbol ‘X’. Formula of its chloride is XCl2.