Question

The element that obeys duplet law is

• A. Oxygen
• B. Hydrogen
• C. Nitrogen
• D. Carbon

Answer 1

The correct option is B

Hydrogen

Correct answer is b) Hydrogen

Explanation of correct answer

Duplet law - If a stable element contain 2 electrons in its valence shell. This stability is acquired by lose , gain or share electron from its valence shell and form chemical bonds.

• Hydrogen contain only one electron in its valence shell.
• It attains stability only by sharing electron of other hydrogen atom.

Explanation of incorrect answer

A) Oxygen

• Electronic configuration of oxygen is 2,6
• It needs two electrons to attain octet

C) Nitrogen

• Electronic configuration of nitrogen is 2,5
• It needs three electrons to attain octet

D) Carbon

• Electronic configuration of carbon is 2,4
• It needs four electrons to attain octet