Question

Find the valency of following elements.

1. Sodium (Na- Atomic number- 11)

2. Chlorine (Cl- Atomic number- 17)

3. Oxygen (O- Atomic number- 8)

4. Krypton (Kr- Atomic number - 36)​

Answer 1

✒Answer:

● Sodium - Valency 1

● Chlorine - Valency 1

● Oxygen - Valency 2

● Krypton - Valency 8

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Answer 2

$\huge\bigstar\sf\red{Answer:}$

$\sf{Valency \ is \ calculated \ by \ the \ number \ of}$

$\sf{atoms \ in \ outermost \ shell.}$

$\sf{Valencies \ are:}$

$\sf{1. \ Sodium=1}$

$\sf{2. \ Chlorine=1}$

$\sf{3. \ Oxygen=2}$

$\sf{4. \ Krypton=8}$