Question

A monatomic ion has a charge of +2. The nucleus of the parent atom has a mass number of 55. If the number of neutrons in the nucleus is 1.2 times that of the number of protons, what is the name and symbol of the element?

Answer 1

Answer:

Manganese  is the name and symbol of the element is Mn.

Explanation:

Charge of the mono-atomic ion = 2+

Atomic mass of the nucleus = 55

Atomic mass =Number of protons + Number of neutrons

Given that :

Number of neutrons = 1.2 (Number of protons)

n = 1.2 × p

$55= p+1.2P$

p = 25

Atomic number is equal to Number of total protons in the nucleus.

The atomic number of an element is 25 which Manganese with symbol 'Mn'.