Question

An element ‘X’ has atomic number 8 and mass number 16. (i) What is such element called? (ii) Find the number of protons, electrons and neutrons in ‘X’. (iii) Find the valency of ‘X’. (iv)Write electronic distribution of ‘X’ in shells.

Answer 1

Answer:

i) Oxygen

ii) Oxygen has 8 protons and 8 electrons.

iii)The valency of oxygen is -2.

iv) In the form of shells : 2, 6

Answer 2

(1) Oxygen

(2) Oxygen has 8 proton and electron

(3) valency of -2

(4)the shell have 2,4