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


Atoms Quiz

Atomic Number is equal to the number of protons
The number of protons is equal to the number of ______________ in an element electrons
Atomic Mass is equal to the _____________________ and __________________ in the element protons and neutrons
The word "atom" comes from the Greek work meaning cannot be divided
Atoms in the outermost shell are known as the valence electrons
According to Dalton’s Atomic Theory, all ________________ are composed of atoms elements
Atom’s mass is measured in amu's
Simple substances that cannot be broken down into simpler substances elements
Two or more elements chemically combined compound
Since atoms have the same number of protons as electrons they are neutral
Compared to protons and neutrons, electrons are smaller
Thomsons Model of an Atom Looks like a cookie - electrons and protons spread all throughout the atom
Rutherford's Model of an Atom Mostly empty space
Bohr's Model of an Atom atoms have energy levels
Protons have a ___________________ charge positive
Electrons have a ___________________ charge negative
Neutrons have a ____________________ charge neutral/no charge
Created by: cbeltrani