Question

An atomic mass unit is equal to
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 1

I believe the answer is  C

Answer 2

the answer is c one twelfth the mass of carbon 12 atom