Question

The ion of an element has 3 unit positive charge. A mass number of its atom is 27 and number of neutrons in it is 14. What is the number of electrons in the ion?
(A) 14
(B) 13
(C) 27
(D) 10

Answer 1

The ion of an element has 3 unit positive charge. A mass number of its atom is 27 and number of neutrons in it is 14. What is the number of electrons in the ion?

(A) 14

(B) 13

(C) 27

(D) 10

answer : option (D) 10

explanation : mass number of an element = number of protons + number of neutrons

given, mass number = 27

number of neutrons = 14

number of protons = 27 - 14 = 13

for neutral element,

number of protons = number of electrons = 13

a/c to question,

The ion of the element has 3 unit positive charge.

so, number of electrons in the ion = 13 - 3 = 10

Answer 2

Answer:

Option d is correct answer.

Explanation: