Question

What are the units and symbols used to describe atomic mass?

What element was used to calculate this unit?
What device can be used to determine the elements found in an unknown substance?
(73 points)

Answer 1

I think the answer may be 20 but I’m not sure

Answer 2

Atomic mass unit (amu) is used to describe atomic mass, with the symbols "u" or "Da" used to represent it. Carbon-12 was used as the reference element to define the atomic mass unit. A spectrometer can be used to determine the elements found in an unknown substance.