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

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Solution

The correct option is B
14

Mass number = No. of protons + No. of neutrons
Since an atom is neutral, no. of protons = no. of electrons, which is necessary for charge balance.

Given, the number of electrons = 13. Therefore, the number of protons is 13.
So, the 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:

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)

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

(a) 13

(b) 10

(d) 16

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