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


What three particles make up every atom? Protons, neutrons, and electrons
What makes an atom a certain element? Number of protons
What particle is negatively charged? Electron
Where are protons and neutrons located? The nucleus
What determines atomic number? Number of protons
What makes isotopes unique? Number of neutrons
What particle is positively charged? Proton
What particle is neutrally charged? Neutrons
What two particles make up nucleons? Protons and neutrons
Where are electrons located? Orbitals
Which particle(s) participate in chemical reactions? Electrons
How many protons does nitrogen contain? 5
How many neutrons does C-11 contain? 5
How many valence electrons does oxygen possess? 8
What does the unit ‘amu’ stand for? atomic mass unit
What particle essentially has no mass? Electron