Use Lewis symbols to show electron transfer between the following pairs of atoms to form cations and anions : (a) K and S (b) Ca and O (c) AI and N.

Explanation

a) Electronic configuration of K and S
`""_(19)K=1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(1)`
`""_(16)S=1s^(2)2s^(2)2p^(6)3s^(2)3p^(4)`
Lewis symbols for K, S and their ions.

b) Electronic configuration of Ca and O
`""_(20)Ca=1s^(2)2s^(2)2p^(6)3s^(2)3p^(6)4s^(2)`
`""_(8)O=1s^(2)2s^(2)2p^(4)`
Lewis symbols of Ca, O and their ions.

c) Electronic configuration of AI and N
`""_(13)AI=1s^(2)2s^(2)2p^(6)3s^(2)3p^(1)`
`""_(7)N=1s^(2)2s^(2)2p^(3)`
Lewis symbols of AI, N and their ions.