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.

Remove Ads
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

Chem Test - atomic

beginning of atomic theory

Moseley discovered that all atoms of an element have the same number of protons
In a single neutral atom the number of protons equals the number of electrons
Ion an atom that has lost or gained electrons
The average mass of an element's atoms atomic mass
1 AMU equals 1 / 12 the mass of a carbon-12 atom
isotopes atoms with the same number of protons but a different number of neutrons
How do you calculate the charge of an atom? protons minus electrons
What lead to idea that cathode rays had neg charged particles? the magnet..
Thomson figured out the charge to mass ratio
Miliken found the charge of a single electron
Becquerel figured out natural radioactivity with the crystals. used radium and pulonium in experiments
Thomoson's Model grapes in jello, positively charged with negative charge in it, did not know how they arranged
Rutherford developed nuclear model of atom
rutherford 2 gold foil --> nucleus
Types of radiation alpha, gamma, beta
alpha positive (4amu)
beta negative (1amu) electron
gamma radiation
Michael Faraday suggested structure of atom somehow related to electricity
Cathode negative
Anode positive
Henri Becquerel discovered radioactivity while working with uranium
charge of a nucleus positive
static electricity electric charges that are not in motion
cathode ray stream of particles orginating from a cathode
coulomb SI unit of electrical charge = 1 electron
radioactivity spontaneous emission of radiation from an element
gamma radiation radiation similar to xrays that is not composed of particles
alpha particle particle with +2 charge emitted by radioactive elements
oil drop done by miliken, measures the charge of a single electron
law of multiple proportions (blank)
Created by: 07adelmanl