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Bohr's Model of an Atom

A neutral ato...

Question

A neutral atom 'X' has a mass number 12 and atomic number 6. Calculate the number of electrons present in the atom.

A

9

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B

6

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C

7

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D

5

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Solution

The correct option is B
6

Atomic number = Number of protons
Number of protons = 6
Number of neutrons
= Mass number - Number of protons
= 12 - 6 = 6
For an atom to remain electrically neutral, the number of electrons should be the number of protons.

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