Atoms, Ions and Compounds (mass spectrometer etc)

describe a mass spectrum?

- y axis: relative abundance (usually in %)
- x axis: mass/charge
- lines represent an isotope

what affect on an element does being an isotope have?

- no change in chemical properties
- physical properties: density/melting and boiling points/ acceleration/ speed of diffusion etc

what do you do if in a relative abundance question doesn't give abundance in %?

- abundance/ total abundance (sum of all abundances) * 100

what is the difference between relative molecular mass and relative formula mass?

- relative molecular mass is only for simple molecular substances
- relative formula mass is just all Ars in a formula added together (use this to avoid mistakes)