Question

which of the following does not have 8 valence electrons?
a.Ar
b.Ne
c.Kr
d.He​

Answer 1

Option C is correct.

• Helium has only two valence electrons because it has only a K shell which can accommodate only 2 electrons. It is called Duplet.
• The remaining options are Noble gases and all of them have 8 electrons in their valence shell.

What are valence Electrons?

• The electrons that are present in the outermost shell are known as Valence electrons.
• These electrons are involved in chemical bonds and are responsible for the interaction of atoms.
• Inner electrons can not take part in chemical bonds, Only valence electrons can.
• These electrons also help us to understand the properties of the atoms.

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Learn more about the formation of chemical bonds

Explain the formation of a chemical bond.

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