Key Definitions Flashcards
0
Q
Relative formula mass
A
The weighted mean mass of a formula unit compared with one-twelfth of the mass of an atom of carbon-12.
1
Q
Isotopes
A
Atoms of the same element with different numbers of neutrons and different masses.
2
Q
Relative atomic mass
A
The weighted mean mass of an atom of an element compared with one-twelfth of the mass of an atom of carbon-12.
3
Q
Relative isotopic mass
A
The mass of an atom of an isotope compared with one-twelfth of the mass of an atom of carbon-12.
4
Q
Relative molecular mass
A
The weighted mean mass of a molecule compared with one-twelfth of the mass of an atom of carbon-12.
5
Q
What is one mole of substance?
A
The amount of substance which contains as many
particles as there are carbon atoms in 12g of 12C atoms.
