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If two covalently bonded atoms are identical the bond is?

Q. If two covalently bonded atoms are identical the bond is?

1. Polar Covalent bond

2. Nonpolar Covalent bond

3. Dipolar bond

4. Nonionic bond

If two covalently bonded atoms are identical the bond is 

Answer: 2 (Nonpolar Covalent bond).

Explanation: If two covalently bonded atoms are identical (eg. Iodine) , then the bond is a nonpolar covalent bond. Two iodine atoms (See the above figure) exhibit equal share of valence electrons (equal electron density); hence, the bond is non polar. If the electron-sharing atoms show an unequal attraction for the electrons, then the bond between these two atoms is a polar covalent bond.

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