1.1, 1.2 Rel. Masses of Atoms & Molecules; Mole/Avogadro

Unified atomic mass unit

1/12 mass of carbon-12 atom

Relative atomic mass (A_r):
w__ a__ m__ of atoms in given sample of e__ compared to the value of the __ atomic mass unit

weighted avg mass, element, unified

Relative molecular mass (M_r)
w__ a__ m__ of a m__ in a given s__ compared to the value of the __ atomic mass unit

weighted avg mass, molecule, sample, unified

Relative formula mass
w__ a__ m__ of a f__ unit compared to the value of the __ atomic mass unit

weighted avg mass, formula, unified

Relative isotopic mass
m__ of a particular a__ of an i__ compared to the value of the u__ atomic mass unit

mass, atom, isotope, unified

1 mole of atoms etc has __ _ __^__ p__

6.02 × 10^23 particles