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

Question

Responses

Hydrogen is in the first row and the first column of the periodic table.
Hydrogen is in the first row and the first column of the periodic table.

Hydrogen only has one electron
Hydrogen only has one electron

Hydrogen does not have any neutrons.
Hydrogen does not have any neutrons.

Hydrogen is stable, with two electrons in its outer shell.
Hydrogen is stable, with two electrons in its outer shell.

Answer 1

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

Hydrogen does not have any neutrons.

This is because hydrogen has an atomic number of 1 (indicating it has one proton) and its most common isotope also has a mass of approximately 1 amu (atomic mass unit), as it only contains this single proton and no neutrons.