NCERT Class XI Chemistry Solutions

Question : 14

Total: 40

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

Solution:

(a) K+ 2 , 8 , 8 , 1 ; K+ 2 , 8 , 8 , 1 +

: 2 , 8 , 6 → K+K+[:

:]2− or K2S
(b) Ca: 2 , 8 , 8 , 2 +

: 2 , 6 → Ca2+[:

:]2− or CaO
(c) .Al:+

: 2 , 5 → Al3+[:

:]3− or AlN

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