Question

1. an atom of neon has a mass number of 20 and an atomic number of 10. how many neutrons does it contain? clear all 10 30 20 5

Explanation:

Step1: Recall the formula for mass number

The mass number ($A$) of an atom is the sum of the number of protons and neutrons, and the atomic number ($Z$) is the number of protons. So, the number of neutrons ($N$) can be found using the formula $N=A - Z$.

Step2: Identify the values of $A$ and $Z$ for neon

For neon, the mass number $A = 20$ and the atomic number $Z=10$.

Step3: Calculate the number of neutrons

Substitute the values into the formula: $N=20 - 10=10$.

Answer:

10