Question

Which Lewis dot diagram shows an atom that needs 2 more electrons in its outermost shell?

Answer 1

Answer: Option (c) is the correct answer.

Explanation:

Atomic number of hydrogen is 1 and one dot in its lewis structure displays only one electron. So, in order to complete its octet it needs one more electron.

Atomic number of carbon is 6 and its electronic distribution is 2, 4. Carbon needs 4 more electrons in order to complete its octet.

Atomic number of oxygen is 8 and its electronic distribution is 2, 6. In order to complete octet, oxygen needs 2 more electrons.

Atomic number of fluorine is 9 and its electronic distribution is 2, 7. In order to complete octet, fluorine needs 1 more electron.

Hence, we can conclude that out of the given options, lewis dot structure of oxygen atom needs 2 more electrons in its outermost shell.

Answer 2

  Lewis dot diagram is also termed as the Lewis structure. It illustrates the bonding between atoms of a molecule.

 (H) hydrogen needs 1 more electron 
 (C)carbon needs 4 more electrons 
 (O) oxygen needs 2 more electrons 
 (F) flourine needs 1 more electron
The answer is letter C.