The atomic number of an element is 16, predict:
(i) the number of valence electrons in its atom.
(ii) its valency.
(iii) its group number
(iv) whether it is a metal or a non-metal.
(v) the nature of oxide formed by it.
(vi) the formula of its chlorides.
(i) Valence electron is 6. Element (16) : 2, 8, 6.
(ii) Valency: 8 - 6 = 2.
(iii) Group number: 10 + 6= 16
(iv) Npn-metal
(v) Acidic oxide
(iv) SCl2