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Q.

The number of valence electrons in the atom of aluminium is _________.

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a

6

b

3

c

4

d

5

answer is C.

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Detailed Solution

The number of electrons present in the outermost orbit of an atom is called valence electrons.
For Aluminium,
Atomic Number = 13
Electronic configuration = (2,8, 3)
The outermost orbit of aluminium contains 3 electrons, which are its valence electrons.

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The number of valence electrons in the atom of aluminium is _________.