The atomic number and mass number of an element are 16 and 32 respectively.
Answers:
(a) No. of protons = atomic number = 16
No. of electrons = no. of protons = 16
No. of neutrons = Mass number – atomic number
= 32 – 16
= 16
(b) Electronic configuration of element: 2, 8, 6
So, Valency = 8 – no. of valence electrons
= 8 – 6
= 2
(c)The element is a non metal because it has 6 valence electrons and hence belongs to group 16.