Let's talk about chemistry..?

Question

1.Does the realtive mass have any unit? Why or why not?
Please explain and give examples.

2. please consider this,

when it comes to atoms, the reference particle is the isotope of carbon, C-12, which is assigned exactly 12 mass units. The relative masses of atoms, known as atomis masses (or atomic weights, have been determined. For some elements, these are:

ELEMENT ATOMIC MASS (relative mass)
hydrogen 1.01
carbon 12.01
oxygen 16.00
iron 55.85
gold 196.97
So, what do these numbers mean?

Answer 1

These numbers are averages, due to the existence of isotopes. We used to take H = 1 as the standard, but no longer. It's now 12C = 12.000.

So C = 12.01 because there are heavier isotopes pushing up the average slightly.

Since these are all relative masses, Ar has no units.