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.

By signing up, I agree to StudyStack's Terms of Service and Privacy Policy.

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

Stack #99948

Antoine Lavoisier French scientist who compiled a list of elements known at the time (23 elements).
John Newlands Proposed an organization scheme for the elements. He came up with the periodic relationship in which there were elements that had similiar properties with the first and eighth, this was known as the rule of octaves. His law was not generally accepted.
Lothar Meyer and Dmitri Mendeleev Both demonstrated a connection between atomic mass and elemental properties. Correctly leaves empty spaces and correctly predicts their properties.
Moseley discovers that each element has a unique # of protons which becomes the atomic number
periodic law there is a repeat in chemical and physical properties when elements are arranged according to increasing atomic number
Ion charged ion, gains or loses electrons
Octet Rule An atom is most stable with 8 valence e-
Periodic Trends properties that change across and down the periodic table in predictable ways
Atomic Radius As you go down a group, radius increases due to more energy levels. As you move across a period, radius decreases due to increase in nuclear charge.
Shielding effect reduction in attraction between the nucleus and the other e- due to e- between them.
Created by: eefine