Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

Username is available taken
show password


Make sure to remember your password. If you forget it there is no way for StudyStack to send you a reset link. You would need to create a new account.
We do not share your email address with others. It is only used to allow you to reset your password. For details read our Privacy Policy and Terms of Service.

Already a StudyStack user? Log In

Reset Password
Enter the associated with your account, and we'll email you a link to reset your password.
Don't know
remaining cards
To flip the current card, click it or press the Spacebar key.  To move the current card to one of the three colored boxes, click on the box.  You may also press the UP ARROW key to move the card to the "Know" box, the DOWN ARROW key to move the card to the "Don't know" box, or the RIGHT ARROW key to move the card to the Remaining box.  You may also click on the card displayed in any of the three boxes to bring that card back to the center.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards
Embed Code - If you would like this activity on your web page, copy the script below and paste it into your web page.

  Normal Size     Small Size show me how

Atomic Stucture

unit 3

atom smallest particle of element that retains it's identity
Democritus - came up with idea of atom - believed atoms were indivisible and indestructable (WRONG)
Dalton's Atomic Theory -- all elements made from atoms -- same element= same atom -- atoms combine in whole number ratios -- atoms can be rearranged but not changed into another atom
electron negative charge
who discovered electron and what did they call them JJ Thomson; corpuscles
JJ Thomson discovered... charge to mass ratio
who did the Cathode Ray experiment JJ Thomson
Millikan found electrons charge which led to finding the mass
who did the oil drop experiemnt Millikan
4 things Thomson did -- discovered electron -- cathode ray experiment -- charge:mass ratio -- Plum Pudding Model
proton positive charge
neutron neutral charge
proton (in chart) symbol: p^+ mass (amu): 1 charge: 1+
neutron (in chart) symbol: n^0 mass (amu): 1 charge: 0
electron (in chart) symbol: e^- mass (amu): 0 charge: 1-
Gold-foil experiment rutherford; shot alpha particles @ gold foil and particles went straight through; some were deflected at large angles
electrons are ____ of nucleus outside
atomic number number of protons
proton #= electron #
nucleus contains most of mass
round atomic mass
neutron number= mass #- atomic number
diff element= diff number of protons
ion same # of protons; diff number of electrons
isotope same# of protons; diff number of neutrons
Created by: carolineeasley