What is Ar (Relative Atomic Mass)

Ar is some peoples' symbol for the *relative* mass of an atom. This is the same as the mass on the periodic table (which has units of amu) but the word RELATIVE is important because it is as compared to atoms of Carbon-12 ... which is a specific isotope of carbon containing 6 protons and 6 neutrons. Chemists have simply DEFINED that atoms like that weigh exactly 12.000000000 amu, and all of the other atomic masses are based on that.

[Leonestudy]

i understand a bit but i need to watch more videos to get it stuck in my head. your video explains it easy for me

[abass]

Thank you very much, a more than wonderful explanation

[rifannizar]

can you please explain the difference between relative atomic mass and relative formula mass please

[feyruza]

Can you make avidio about avarag atomic mass and this one wes very helpful thank you.😘