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19 Cards in this Set
- Front
- Back
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atomic number
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# of protons.....
equal to # of electrons |
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result # 1
conclusion # 1 |
1)most alphas go straight through foil
1) atoms are mostly empty |
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result 2
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some alphas go to the side
1) electrons are outside of nuclues |
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result and conc. # 3
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very few come back in yo facw
2) most mass in nucleus is verrrrrrrrrrrrrry small |
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other explanations with no backup
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electrons are spinning
existence of neutron like planetary system |
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electron cloud
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3d and stays same distance away (same orbit)
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quark
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break down of protons and neutrons
(red green blue) |
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names of quarks
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truth and beauty
strange and charm up and down |
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atomic mass number
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average weight of nuclues
((add up and divide)) |
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masss #
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protons plus neutrons
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isotope
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atoms of same element
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right of stairstep
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nonmetals
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stair step
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metalloids
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left of stairs
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metals
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said atom is the building block if alll matter
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Democritus
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carbon's atomic mass #
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12
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alpha shooter project
helped out |
Ernest Rutherford
Geiger, Marsden, Bohr |
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Bohrs rule
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2-8-8-rest
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in periodic table...elements react (how?)
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going down column
Dmitri Mendeleev |
