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

Science 4.1

4.1 parts of an atom/Bohr model

Number of protons in an atom = number of _________ in an atom Number of electrons in an atom
Atomic number = the number of ___________ in an atom number of protons in an atom
Mass number = number of _________ + number of _________ protons + neutrons
What are the electrons in the outermost energy level called? valence electrons
Which electrons have the most energy? valence electrons
What makes an atom stable? Having a full outer shell
How many electrons can the first level hold? The second and 3rd levels? 1 8
How do you find the number of neutrons in an atom? Mass number - number of neutrons
What happens if the outer shell of an atom is not full? It will bond with another atom, by gaining or losing electrons.
Created by: mtnbrook