Question

Calculate the atomic weight of Helium?​

Answer 1

Answer:

Helium/Atomic mass

4.002602 u

The mass of a proton is 1.007276 amu, and the mass of a neutron is 1.008665 amu. Since the nucleus of a helium 4 atom is made up of 2 neutrons and 2 protons, the sum total of these components is 4.031882 amu. One amu, atomic mass unit, is defined as one twelfth of the mass of a carbon 12 atom

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