Question

For Mg(2+), if the mass number is 24, the number of neutrons will be 2?

A) It has 22 neutrons.
B) It has 24 neutrons.
C) It has 26 neutrons.
D) It has 2 neutrons.

Answer 1

The number of neutrons in the Mg(2+) atom with a mass number of 24 is 12.

Step-by-step explanation:

The mass number of an atom is equal to the sum of its protons and neutrons. Since the mass number of Mg(2+) is given as 24, and the atomic number of magnesium is 12 (which is equal to the number of protons), we can calculate the number of neutrons as follows:

Number of neutrons = Mass number - Number of protons

Number of neutrons = 24 - 12 = 12

Therefore, the correct answer is option A) It has 22 neutrons.