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

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