Biology, asked by yashu06patel, 8 months ago

Find valency of following element

1. Helium
2. Magnesium

Answers

Answered by renuagrawal393

2

Answer:

Helium=0

Magnesium=2

hope it helps you.....

Answered by pranay0144

4

Explanation:

1. Helium

Valancy = 0

Reason = ♠️ No valance electron present

♠️Duplet is completed

Amtomic number - 2

Electronic configuration - 2

2 magnesium

Valancy= 2

Reason =♠️ belongs to group 2

♠️ Two electron in outermost shell

Atomic number - 12

Electronic configuration - 2,8,2

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