An element ‘X’ has an atomic mass number = 27. If the number of electrons = 13. Then the number of neutrons will be _____.

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Solution

The correct option is B
14

Atomic mass number = number of protons + number of neutrons
Since an atom is neutral, the number of protons = the number of electrons, which is necessary for charge balance.

Thus the number of protons = 13, as the number of electrons = 13.
So number of neutrons will be 27 – 13 = 14

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Similar questions

An element ‘X’ has mass number 27. If the number of electrons is given as 13, the number of neutrons is:

(a) 13

(b) 10

(d) 16

An element ‘X’ has mass number = 27. If the number of electrons is given as 13, the number of neutrons will be _____.

An element ‘X’ has mass number = 27. If the no. of electrons is given as 13, the no. of neutrons will be ___ .

(Assume that atom is neutral)

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