Question

An ion M²+ contains 10 electrons and 12 neutrons. What is the mass no. and atomic no. of that element M?​

Answer 1

Answer:

Explanation:

Atomic mass will 22

Atomic number will 10

Answer 2

Since the given element has 2 unit positive charge,it must have lost 2 electrons.

Therefore the number of electron=10+2=12

Atomic number =number of electron

Atomic number =12

Number of electron =number of proton

Number of proton =12

Mass number=number of proton +Number of electron

Mass number =12+12=24u