Question

one atomic mass unit is approximately equal to the _______. a mass of a proton b mass of a helium atom c mass of a carbon atom d mass of an electron

Explanation:

One atomic mass unit (amu) is defined as 1/12th the mass of a carbon - 12 atom. The mass of a proton is approximately 1 amu. A helium atom has a mass of about 4 amu, a carbon atom has a mass of about 12 amu, and an electron has a very small mass (about 1/1836 amu).

Answer:

a. mass of a proton