Which statement best explains why hydrogen’s atomic number is equal to its mass?(1 point)

Question

Hydrogen is in the first row and the first column of the periodic table.
Hydrogen only has one electron
Hydrogen is stable, with two electrons in its outer shell.
Hydrogen does not have any neutrons.

Answer 1

The statement that best explains why hydrogen’s atomic number is equal to its mass is:

Hydrogen does not have any neutrons.

Hydrogen has an atomic number of 1 (indicating it has one proton) and, in its most common isotope, it also has no neutrons. Therefore, its atomic mass (approximately 1 atomic mass unit) is essentially equal to its atomic number.