Question

The ion of an element has 3 positive charge, 27 mass-number and 14 neutrons. What is the number of electrons in this ion?

• A. 13
• B. 14
• C. 10
• D. 16

Answer 1

The correct option is C

10

Given

3 positive charge

27 mass number

14 neutron

Mass number of any atom = No. of protons + No. of neutrons

27 = No. of protons + 14

No. of protons = 13

No. of protons in atom = No. of electrons in atom = 13

No. of electrons in ion = 13 – 3 = 10