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NCERT Exemplar Solutions Class 9 Science Solutions for Structure of the Atom - Exercise in Chapter 4 - Structure of the Atom

Question 19 Structure of the Atom - Exercise

The electron distribution in an aluminium atom is

(a) 2, 8, 3

(b) 2, 8, 2

(c) 8, 2, 3

(d) 2, 3, 8

Answer:

The answer is (a) 2, 8, 3

Explanation:

The atomic number of Aluminium is 13, the First shell can have a maximum of 2 electrons and the second shell holds a maximum of 8 electrons. Hence option a is the right answer.

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