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.
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

Vocab 2.1-2.2


atom: a small particle that is the building block of matter
compound: a substance made of two or more elements that are chemically joined in a specific combination
element: a substance made of only one kind of atom
heterogeneous mixture: a mixture in which two or more substances are evenly mixed, but not bonded together
matter: anything that has mass and takes up space
mixture: matter that can vary in composition
molecule: two or more atoms that are held together by chemical bonds and act as a unit
substance: matter with a composition that is always the same
atomic number: the number of protons in the nucleus of an atom of an element
electron: a negatively charged particle that occupies the space in an atom outside the nucleus
electron cloud: the region surrounding an atom's nucleus where one of more electrons are most likely to be found
ion: an atom that has a charge because it has gained or lost electrons
isotope: one of two or more atoms of an element having the same number of protons, but a different number of neutrons
neutron: an uncharged particle in the nucleus of an atom
nucleus: the region at the center of an atom that contains most of the mass of the atom
proton: a positively charged particle in the nucleus of an atom
Created by: norrijus2555



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