Chemistry-atoms
Terms
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- atomic number
- # of protons
- atomic masses (atomic weight)
- a ratio
- amu
- stands for Atomic mass unit
- A= Z= X=
- A=mass number (# of protons and neutrons) Z=Atomic number (# of protons) X=element symbol
- isotopes
- atoms with the same atomic number but different mass numbers
- percent abundance
- # of atoms of a given isotope/total# of atoms of isotope
- First to think about the atomic theory
- Dalton
- discovered that uranium emitted rays
- Henri Becquerel
- isolated polonium and radium which emit rays
- Marie Curie
- who discovered electron?
- michael Faraday
- provided the existence of electron
- JJ Thomson
- Milikan oil drop person what did he discover?
- Robert andrews milikan the strength of the charge
- who discovered proton?
- Ernest Rutherford
- discovered neutron
- James Chadwick
- Who made the first model of atom? (the pudding)
- J J thomson
- who tested if the pudding shape atom was true?
- Ernest Rutherford