Question

According to Lewis and Kossel approach, which of the following molecules has complete octet of the
central atom?
a) Licl b) BeH2 c) BCl3 d) CO2​

Answer 1

hello mate

BCl3 (c) is the answer of your above question...

Mark as brainliest PLEASE

Answer 2

Answer:

The correct answer to the question-"According to Lewis and Kossel approach, which of the following molecules has complete octet of the central atom?"is-

d) CO2​

Explanation:

Kossel Lewis approach

Kossel and Lewis developed the electronic theory According to this theory, every atom tries to attain octet configuration (presence of eight electrons) in its valence shell by losing or gaining or by sharing of electrons.

They made this electronic theory of valence to explain the formation of chemical bonds between the two atoms.

a) Licl

To form Licl will give one electron to cl and to be stable it acquires the electronic configuration of helium that has only 2 electrons in its last shell.

Hence, it is an exception to the octet rule.

b) BeH2

The BeH2 molecule has a total of 4 valence electrons as a result of the foregoing reasoning. With the core central beryllium atom, the   covalent bonds is formed, two-terminal hydrogen atoms leaving the beryllium atom with no lone pairs on it.

Hence, it is an exception to the octet rule.

c) BCl3

The central boron atom in boron trichloride (BCl3) has six valence electrons  There are a number of molecules whose total number of valence electrons is an odd number.

Hence, it is an exception to the octet rule.

According  to Lewis and Kossel approach, CO2​ molecules has complete octet of the central atom

So, it will form a covalent bond with two oxygen atoms and complete it's octet.

Hence carbon acquires octet in its valence shell by sharing of electrons. Therefore option (d) is correct.