Question

What information could you use to determine the atomic number of an unknown element

that has a mass number of 22?
O
A. number of ions
B. number of isotopes
C. number of neutrons
O
D. number of electrons

Answer 1

Answer:
The mass of an atom is based on the number of protons and neutrons in its nucleus.

Answer 2

The correct answer is option C.

Step-by-step explanation:

Atomic number(Z) = Total number of protons present in a nucleus of an atom.

Atomic mass(M) = Sum of protons and neutrons present in the nucleus

M = Z + Total number of neutrons

If we are given with mass number of an element and we are said to determine the atomic number of the compound:

22 = Z + Total number of neutrons

Z = 22 - Total number of neutrons

We will require total number of neutrons to determine the atomic number of an unknown element that has a mass number of 22.