Question

Explain electrons dot structure for sodium ,magnesium and oxygen

Answer 1

for sodium its _2,8,1 ( 1s_2, 2s_2 2p_6 & 3p _1 )
mg its 2,8,2(1s_2,2s_2 2p_6 , 3s_2)
oxygen its 2,4,2( 1s_2, 2s_2 ,2p_4)