Question

Which atom attains a stable valence electron configuration by bonding with another atom?

(1) neon (3) helium(2) radon (4) hydrogen

Answer 1

The atom that can attain a stable valence electron configuration by bonding with another atom is the hydrogen. The answer is number 4. The elements neon, helium and radon are already stable and does not need other elements to bond with.

Answer 2

Answer: Option (4) is the correct answer.

Step-by-step explanation:

The electronic configuration of neon in ground state is
`1s^(2)2s^(2)2p^(6)`.

The electronic configuration of helium in ground state is
`1s^(2)`.

The electronic configuration of radon in ground state is
`Xe 4f^(14)5d^(10)6s^(2)6p^(6)`.

The electronic configuration of hydrogen in ground state is
`1s^(1)`.

Therefore, from the above electronic configurations it can be seen that only hydrogen has deficiency of 1 electron and rest all the elements have completely filled shells. So, in order to complete its octet hydrogen will readily accept one electron.

Therefore, hydrogen will attain a stable valence electron configuration by bonding with another atom.