Questions: Identify the following from this isotope. Ne Name of isotope: Ne Atomic mass number: 21 Atomic number: 10 Number of protons: Number of neutrons:

Identify the following from this isotope.
Ne

Name of isotope: Ne

Atomic mass number: 21

Atomic number: 10

Number of protons:

Number of neutrons:

Transcript text: Identify the following from this isotope. ${ }_{10}^{21} \mathrm{Ne}$ Name of isotope: Ne $\qquad$ Atomic mass number: 21 $\qquad$ Atomic number: 10 $\qquad$ Number of protons: $\qquad$ Number of neutrons: $\qquad$

Solution

Solution Steps

Step 1: Identify the Number of Protons

The atomic number of an element is equal to the number of protons in its nucleus. For the isotope ${ }_{10}^{21} \mathrm{Ne}$, the atomic number is 10. Therefore, the number of protons is 10.

Step 2: Calculate the Number of Neutrons

The atomic mass number (also known as the mass number) is the sum of the number of protons and neutrons in the nucleus. For ${ }_{10}^{21} \mathrm{Ne}$, the atomic mass number is 21. To find the number of neutrons, subtract the number of protons from the atomic mass number:

\[ \text{Number of neutrons} = \text{Atomic mass number} - \text{Number of protons} = 21 - 10 = 11 \]