Question

pls help me guys.......​

Answer 1

i can't understand your handwriting

Answer 2

i) atomic no. Will be 8 and mass no. Will be 16

ii) protons and electrons will be 8

Neutron no. = mass no. - atomic no.

= 16 - 8 = 8

iii). Electronic configuration = 2,6

It needs two more electron to complete its octet so its valency will be -2

(for your extra information the element x is nothing but oxygen)

Hope this helps :)