Busy. Please wait.
Log in with Clever

show password
Forgot Password?

Don't have an account?  Sign up 
Sign up using Clever

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.
Your email address is only used to allow you to reset your password. See 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.
Didn't know it?
click below
Knew it?
click below
Don't Know
Remaining cards (0)
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

Atoms/ Period Table


Atom smallest particle of an element that maintains the properties of that element
Atomic mass average mass number of all atoms of an element (from particles in the nucleus)
Atomic number the number of protons in the nucleus of an atom; used to determine an element's position in the Periodic Table
Chemical property a characteristic of a substance that describes how it combines with other substances to form new ones
Electrical charge a property of a subatomic particle; positive (protons), negative (electrons), or neutral (neutrons)
Electron a negatively charged particle in the electron cloud surrounding the atomic nucleus
Electron cloud he negatively charged space containing electrons that surrounds the atomic nucleus
Element a pure substance that cannot be broken down chemically into simpler substances
Groups (families) the vertical columns on the Periodic Table
Mass number total number of protons and neutrons in a specific atom
Neutron a (neutral) particle with no electrical charge within the atomic nucleus
Nucleus the positively charged center of an atom containing the protons and neutrons
Periodic Table a conceptual model in which the elements are organized according to their properties; often displayed as a chart
Periods the horizontal rows on the Periodic Table
Physical property property of matter that can be observed without changing the composition or identity of the matter
Proton a positively charged particle within the atomic nucleus; used to identify an element
Reactivity tendency of a substance to undergo chemical changes in a system
Subatomic particle a particle smaller than an atom, such as a proton, neutron, or electron
Valence electron(s) electron(s) located in outer energy level (electron shell)
Created by: llocklar
Popular Science sets




Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!
"Know" box contains:
Time elapsed:
restart all cards