Question

find valency



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Answer 1

Answer:

Explanation:

The atomic number of Sodium is 11

Electronic configuration = 2,8,1

Threfore, valency = 3

Atomic No. of oxygen = 8

Electronic configuration = 2,6

valency = 2

Atomic no. of helium = 2

Configuration = 2

valency = 0

Answer 2

Answer:

metal:-sodium

valency:-1

non metal:-oxygen

valency:-2

non metal:-helium

valency:-0

Explanation:

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