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Question

How many electrons are there in an atom of lithium?

A
2
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B
4
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C
3
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D
8
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Solution

The correct option is C 3
Atomic number of lithium is 3. This tells us that lithium is made up of 3 protons.
Number of protons = Number of electrons
Therefore, there are three electrons present in a lithium atom.
Electronic configuration of lithium is 2, 1.

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