The ion of an element has 3 positive charges. Mass number of the atom

1.	The ion of an element has 3 positive charges. Mass number of the atom is27 and the number of neutrons is 14. What is the number of electrons in the ion?A. 13B. 10C. 14D. 16
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.

The ion of an element has 3 positive charges. Mass number of the atom is27 and the number of neutrons is 14. What is the number of electrons in the ion?A. 13B. 10C. 14D. 16

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.