Carbon forms four covalent bonds by sharing its four valence e

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Solution

Q.
Carbon forms four covalent bonds by sharing its four valence electrons with four univalent atoms, e.g., hydrogen. After the formation of four bonds, carbon attains the electronic configuration of:

1 Helium

2 Neon

3 Argon

4 Krypton

Ans.
(2)

The electronic configuration of carbon (C) is 2, 4. To complete its octet, it will share its 4 valence electrons with hydrogen atom and form $C H ₄$ molecule. As carbon is sharing its 4 valence electrons, it will form four covalent bonds.
Now, the electronic configuration of C in $C H ₄$ is 2, 8.
Electronic configuration of Ne (atomic number = 10) is 2, 8. Hence, after the formation of four covalent bonds, carbon attains the electronic configuration of Neon.

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