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

CHEM 090 Lecture 4


What is an atom? The fundamental building blocks of matter
Atoms are made up of? Protons, Neutrons and Electrons
Neurons and protons makes up? The neucleus
What is the atomic number? Number of protons
What is the atomic mass? Number of protons + number of electrons
What charge do protons have? Positive
What charge do electrons have? Negative
What charge do neutrons have? Neutral
Why are Neutrons neutral? Positive protons are the same as negative electrons so neutrons are neutral to cancel each other and give the atom a neutral charge
The way electrons are placed into shells of an atom are called Electronic configuration
The most outer shell in an atom is called. Valence shell
What are isotopes? Atoms of the same element with the same number of protons and electrons but different number of neutrons
Created by: Tee Taylor