Question

6 if hydrogen has isotopes h - 1, h - 2, h - 3, what do the numbers represent? a mass number b number of neutrons c atomic number d number of protons

Explanation:

Isotopes are atoms of the same element with different mass numbers. The notation H - 1, H - 2, H - 3 uses the mass number to distinguish between the isotopes of hydrogen. The atomic number of hydrogen is 1 (number of protons), and isotopes have the same atomic number but different numbers of neutrons which affects the mass number.

Answer:

A. mass number