Question

Write the electronic configuration Li,Be,C,O,Na,Mg,Al and mention which period these element belongs in Modern Periodic table​

Answer 1

Answer:

Li=2,1 second period

Be=2,2 second period

C=2,4 second period

O=2,6 second period

Na=2, 8, 1 third period

Mg=2, 8,2 third period

Al=2, 8,3 third period