The ion of an element has 3 positive charges. Mass number of the atom is 27 and the number of neutrons is 14. What is the number of electrons in the ion?

Question

Philoid · Accepted Answer

Given that the Mass number of the atom is 27.

⇒ Number of protons + number of neutrons =27

⇒ Number of protons + 14 =27

⇒ Number of protons = 13

Therefore number of electrons in a neutral atom = 13

The ion of the element has 3 positive charges.

⇒ Number of electrons = 13-3=10

Hence, option B is correct.