Question

Which of the following molecules has a central atom with complete octet?

Options

• Boron trifluoride

• Methane

• Aluminium chloride

• Sulphur hexafluoride

Answer 1

Methane

Explanation:

Methane molecule has a central atom (carbon) with complete octet.

Lewis dot structure of CH₄

Because carbon has just four valence electrons, it can bond at any of the four points. Hydrogen has only one valence electron that it can share. As a result, carbon shares four hydrogen electrons at four places, forming a full octet.