C2_atoms + the atomic structure

contents of an atom.
1. electrons
  1. mass= 0.0005
  2. charge= -1
2. protons
  1. mass= 1
  2. charge = +1
3. neutrons
  1. mass = 1
  2. charge= 0
  3. mass number - atomic number.
electronic congifuration
1. the first shell has 2 electrons
  1. the other shells have a maximum of 8.
    1. e.g. carbon. = 2, 4
atoms are the smallest particle of an element.
1. atomic number = no.protons=electron
2. mass number = no. neutrons + protons.
  1. always bigger+untop
Ions.
1. when an atom loses or gains electrons.
2. lose electron, more protons, positive charge
3. gain electron, more electrons, negative charge
4. eg. ^19F-
  1. fluoride= p; 9, n;10 e; (plus one, it had a minus one) 10
isotopes
1. different number of neutrons.
  1. same electrons and protons
contributions.
1. john dalton
  1. ~all matter is made up of atoms
  2. ~discovered atoms
2. Joseph Thompson
  1. ~found the sub-atomic particle, electron
3. Earnest Rutherford
  1. ~nucleus is positively charged
  2. ~discovered second aub-atomic particles
4. Niels Bohr
  1. ~discovered the outer shells
  2. ~found out electrons spiral inwards

Resource summary

	Created by eleanor ayeni over 8 years ago