C2 - Atoms, Ions and Compounds Flashcards
1
Q
What is an isotope?
A
Atoms of the same element with different numbers of neutrons and different masses
2
Q
What are cations and anions?
A
Cations are positive ions
Anions are negative ions
3
Q
What is the relative atomic mass?
similar to relative isotopic mass
A
The weighted mean mass of an atom relative to 1/12th the mass of one C12 atom.
4
Q
What’s the relative molecular mass?
A
The mass of one molecule relative to 1/12th the mass of one C12 atom.
5
Q
What is the mass:charge ratio?
A
m/z mass to charge ratio =
relative mass of ion / relative charge of ion
ions with a low m:z are deflected more
