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Lisa P English 7 cards

Cards in this deck (7)

1name the order of the people for the history of the atomgreeks, dalton, thomson, geiger and marsden, rutherford, bohr, chadwick
2what did the greeks say about the atombelieved you ended up with a particle that couldn't be split up any further
3what did dalton say about the atom-atoms are tiny particles making up elements
-cannot be broken down further
-atoms of an element are the same
4what did thomson say about the atomdiscovered electrons
-negative electrons moving around in a sea of positive charge
- and + charges were equal so the atom was neutral
-used cathode ray tube
(plum pudding model)
5what did rutherford say about the atom-targeted alpha particles at a thin sheet of gold foil and measured the deflection
-most weren't deflected, small percentage deflected through large angles, very few deflected back on them selves
CONCLUSION: positive charge with most of the mas concentrated in the centre the rest was empty space
6what did bohr say about the atomelectrons could only follow a certain path (electron shells)
7what did chadwick say about the atomdiscovered neutron, mass similar to proton, uncharged