Question

Predict the valence of following elements (A)atom number 5,(B)atom number 12,(C)atom number 14(,D)atom number 17

Answer 1

(a)-3,+3
(b)+2
(c)+2
(d)+4
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Answer 2

Answer:

Valency is the combination capacity of a shell.

Valance electron are the electrons at the outermost shell.

Valence electron of the above are:-

• +3 [Boron]
• +2 [magnesium]
• +2,+4 [silicon]
• -1 [chlorine]

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