Question

neon-22 contains ______ neutrons. 10 12 22 2

Explanation:

Step1: Recall the formula for neutrons

The number of neutrons ($n$) in an atom is given by the formula $n = A - Z$, where $A$ is the mass number and $Z$ is the atomic number. For Neon, the atomic number $Z = 10$ (from the periodic table), and the mass number $A$ for Neon - 22 is 22.

Step2: Calculate the number of neutrons

Substitute $A = 22$ and $Z = 10$ into the formula: $n=22 - 10 = 12$.

Answer:

12 (and the correct option is the one with 12, i.e., the option marked with the blue dot, which is the option labeled "12")