Question

What is the atomic number of an element defined as?
1 point
The number of electrons in a neutral atom
The total number of neutrons in an atom
The average mass of an atom in atomic mass units
The total number of protons in the nucleus of an atom

Answer 1

The atomic number of an element is defined as **the total number of protons in the nucleus of an atom**. Therefore, the correct answer is:

**The total number of protons in the nucleus of an atom.**