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

T.J.'s science notes

study notes for chapter 12 & 13

vocabdefinitions
element a pure substance that can not be broken down by chemical or physical means and cant be put into a simpler substance
compound a pure substance composed of 2 or more elements that are chemically combined
mixture a combination of 2 or more substances that are not chemically combined
atom the smallest particle into which an element can be divided and still retain all of the properties of that element
proton the positively charged particles of the nulceus; the # of protons in the nucleusis the atomic # which determines the identity of an element
electron the negatively charged particles found in all the atoms; electrons are involved in the formation of chemical bonds
neutron the particles of the nucleus that have no charge
periodic having a regular repeating pattern
periodic law a law that states that the chemical and physical properties of the elements are periodic functions of their atomic #'s
atomic # the # pf protons on the nucleus of an atom; the atomic # is the same for all atoms of an element
atomic mass the weighted average of the masses of all the naturally occuring isotopes of an element
isotope atoms that have the same # of protons but have different #'s of neutrons
vallence electron the electrons in the outermost energy level of an atom; these electrons are involved in the forming chemical bonds
John Dalton thought up the atomic theory
J.J. Thomson thought up the thought of small particles in the atom
Ernest Rutherford positive charged nucleus; atom mostly is empty space; electrons travel around nucleus
Niels Bohr electrons travel in cluods
Democritus 1st to come up with idea of atom
Demetri Mendeleev father of the periodic table; arranged the elements by atomic mass
Henry Mosely rearranged Periodic tabel by atomic mss
Created by: tsingh
Popular Science 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