Question

An atom ‘X’ belongs to the sixteenth group and third period of the modern
periodic table. Find the number of valence electrons, valency, nature of the
element and the formula of the compound formed by sodium and ‘X’.

Answer 1

valence electrons = 6
valency = 8-6 = 2
nature of element = non-metal
nature of it's oxide = acidic
formula made with sodium (if element is denoted by x) = Na2X
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