Question

Define the atomic mass unit​

Answer 1

Explanation:

hi

a unit of mass used to express atomic and molecular weights, equal to one twelfth of the mass of an atom of carbon-12.

Answer 2

Answer:

atomic mass is defined as the sum of no. of electrons and neutrons or protons and neutrons present in that atom of an element.

Explanation:

example- atomic mass of oxygen is 16u or 16 units