Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
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. Your email address is only used to allow you to reset your password. See 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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't Know
Remaining cards (0)
Know
0:00
edit
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

Chemistry Chap 4.1 - 4.2

QuestionAnswer
Dalton's Theory #1 All elements are composed of tiny INDIVISIBLE particles called atoms.
What are the three types of subatomic partics? protons, neutrons, electrons
Which subatomic particle has a negative charge? positive charge? neutral? protons= positive, electron= negative, neutrons= neutral
Which subatomic particles are found in the nucleus? protons and neutrons.
an atom the smallest particle of an element that retains its idenity in a chemical reaction.
electrons negatively charged subatomic particles.
Dalton's Theory #2 Atoms of the same element are IDENTICAL. Atoms of an element are DIFFERENT from atoms of any other element.
Dalton's Theory #3 Atom's of different elements can phyically mix and chemically combine in WHOLE-NUMBER RATIOS to form compounds.
scanning tunneling microscope instrument used to observe individual atoms
Democritus Greek philosopher who believed that matter was made of atoms, which were indivisible and indestructible.
J.J. Thomson Discovered the electron in experiments with cathode rays.
Who discovered that electrons were negatively charged? How did he learn this? J.J. Thomson. He found that negatively charged plates would repel a cathode ray.
cathode ray glowing beam of electrons
Robert A. Millikan Measured the quantity of charge of an electron and its mass.
mass of an electron 1/1840 of the mass of a hydrogen atom
Eugen Goldstein Discovered protons
James Chadwick Discovered neutrons
Ernest Rutherford Discovered the nucleus during gold-foil experiments.
Rutherford's model of the atom An atom is mostly empty space, with a dense nucleus with electrons moving around it.
Whose model of the atom is known as the plum-pudding model? Rutherford's
dalton's #4 chemical reactions occur when atoms are SEPARATED, JOINED, OR REARRANGED. Elements are never changed into another element in a chemical reaction.
Created by: phersont
Popular Chemistry sets

 

 



Voices

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:
Retries:
restart all cards