Zusammenfassung der Ressource
C2_atoms + the atomic structure
- contents of an atom.
- electrons
- mass= 0.0005
- charge= -1
- protons
- mass= 1
- charge = +1
- neutrons
- mass = 1
- charge= 0
- mass number - atomic number.
- electronic congifuration
- the first shell has 2 electrons
- the other shells have a maximum of 8.
- e.g. carbon. = 2, 4
- atoms are the smallest particle of an element.
- atomic number = no.protons=electron
- mass number = no. neutrons + protons.
- always bigger+untop
- Ions.
- when an atom loses or gains electrons.
- lose electron, more protons, positive charge
- gain electron, more electrons, negative charge
- eg. ^19F-
- fluoride= p; 9, n;10 e; (plus one, it had a minus one) 10
- isotopes
- different number of neutrons.
- same electrons and protons
- contributions.
- john dalton
- ~all matter is made up of atoms
- ~discovered atoms
- Joseph Thompson
- ~found the sub-atomic particle, electron
- Earnest Rutherford
- ~nucleus is positively charged
- ~discovered second aub-atomic particles
- Niels Bohr
- ~discovered the outer shells
- ~found out electrons spiral inwards