Question

8. The atomic number of three elements A, B and C are 11, 14 and 17 respectively.​

Answer 1

Answer:

The atomic number 11 is sodium(Na)

The atomic number 14 is silicon (Si)

The atomic number 17 is chlorine(Cl)

Answer 2

Answer:

Element B has atomic number 14 and its electronic distribution is 2,8,4 .this is silicon and since , it contains 4 valance electron hence ,it belongs to group 4 of the periodic table .Electron C has atomic number 17 and its electronic distribution 2 ,8,7