Question

which of the following is defined as the mass of an atom based on the mass of an atom of carbon-12

1. atomic number
2. isotope
3. atomic mass
4. atomic change

i dont understand this question

Answer 1

did you ever hear about unified atomic mass?
so you measure mass of any atom by comparing it to 1/12 of C-12 mass... what do you think now the answer is?

Answer 2

atomic mass??

Answer 3

yes

Answer 4

great thank you

Answer 5

np