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

Chemistry Ch.4

Democritus Called natures basic particle an atom, meaning "indivisible"
Aristotle was much more influential, and his opinion that matter could be infinitely divided prevailed for almost 2000 years. earth, water, air, fire.
What are the important modifications of the modern atomic theory? 1) Atoms are divisible 2) An element can have atoms with different masses.
Why can Dalton's ideas be called a theory? Dalton changed Democritus' ideas into a scientific theory that could be tested. As a result, some aspects of Daltons theory have changed.
What is the modern atomic theory that Dalton proposed? Proposed that the elements where composed of atoms and only whole numbers of atoms can combine and form compounds.
How come Aristotle and Democritus ideas not considered theories? Because there was not scientific testing neither view could be supported by experimental evidence.
Atom Is defined as the smallest particle of an element that retains the chemical properties of that element.
What is the "anatomy" of an atom? nucleus + electron cloud.
Created by: slinenkugel13