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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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



Use these flashcards to help memorize information. Look at the large card and try to recall what is on the other side. Then click the card to flip it. If you knew the answer, click the green Know box. Otherwise, click the red Don't know box.

When you've placed seven or more cards in the Don't know box, click "retry" to try those cards again.

If you've accidentally put the card in the wrong box, just click on the card to take it out of the box.

You can also use your keyboard to move the cards as follows:

If you are logged in to your account, this website will remember which cards you know and don't know so that they are in the same box the next time you log in.

When you need a break, try one of the other activities listed below the flashcards like Matching, Snowman, or Hungry Bug. Although it may feel like you're playing a game, your brain is still making more connections with the information to help you out.

To see how well you know the information, try the Quiz or Test activity.

Pass complete!

"Know" box contains:
Time elapsed:
restart all cards