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.
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

Matter and Atoms

Ch. 1

anything that has mass and takes up space. matter
a small particle that is the building block of matter. atom
matter with a composition that is always the same substance
a substance that consists of only one type of atom. element
two or more atoms that are held together by covalent bonds and act as a unit. molecule
a substance containing atoms of two or more different elements chemically bonded together. compound
matter that can very in composition. mixture
a mixture in which substances are not evenly mixed. heterogeneous mixture
a mixture in which two or more substance are evenly mixed but not bonded together. homogeneous mixture
the region in the center of an atom where most of an atoms mass and positive charge is concentrated. nucleus
a positively charged particle in the nucleus of an atom. proton
a neutral particle in the nucleus of an atom. neutron
a negatively charged particle that occupies the space in atom outside the nucleus. electron
the region surrounding an atoms nucleus where one or more electrons are most likely to be found. electron cloud
the number of protons in an atom of an element. atomic number
an atom of the same element that have different numbers of neutrons. isotope
an atom that is no longer neutral because it has lost or gained valence electrons. ion
what are solutions? examples... a a mixture in which two or more substances are evenly mixed, but not bonded together. brass,gases,ammonia cleaner,water.
Created by: RiRibug