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

Basic Chemistry

atom smallest unit of matter that still retains the properties of an element
element a substance that cannot be broken down into other substances
compound substance consisting of 2 or more elements in a fixed ratio
charge of a proton positive
charge of an electron negative
charge of a neutron neutral
atomic number is the number of protons in the nucleus of an atom
atomic mass is the number of protons and neutrons in the nucleus of an atom
the 6 most common elements in living things are CHNOPS
what does CHNOPS stand for carbon, hydrogen, nitrogen, oxygen, phosphorus, sulfer
the element you are mostly by weight is oxygen
the most common element by numbers is hydrogen
nitrogen is used in living systems to make proteins
hydrogen and helium only have 1 shell of electrons
valence electron is the number of electrons in the outer electron shell
the first shell, second, third can hold 2, 8, 8
atoms are most stable when their outermost shell is full
an atom is an ion when it is charged
a positive ion has an extra proton
a negative ion has an extra electron
Created by: edenbreslauer