What is the mass of the nucleus of the most common type of hydrogen atom

Protium, 1H, has no neutrons in its nucleus and is the most common form of hydrogen, with an atomic mass of ~1.0078 Da (dalton) and an isotopic abundance of ~99.972% of all hydrogen on Earth

Explanation:

1.0078 Da

Protium, 1H, has no neutrons in its nucleus and is the most common form of hydrogen in the universe the hydrogen is so common that it is every where in the upper-middle at an astounding 99.98% in the isotopic level and it is the most abundant in the univerce this is what makes stares.

Explanation:

c is the answer because when something is left after something evaporates that shows the chemical change.

it would be a gas formation