Question

An atomic mass unit is equal to

Answer 1

\[Atomic~mass=A\]\[Atomic~number=Z\]\[Neutron=N\]
therefore
\[A=Z+N\]
So, Atomic mass is form by Atomic number plus Neutrons

Answer 2

a.
one-half the mass of a hydrogen atom.
b.
one-fourth the mass of a lithium atom.
c.
one-twelfth the mass of a carbon-12 atom.
d.
one-fifteenth the mass of a nitrogen-15 atom

Answer 3

C. one-twelfth the mass of a carbon-12 atom.