Save
Busy. Please wait.
or

show password
Forgot Password?

Don't have an account?  Sign up 
or

Username is available taken
show password

why


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.
focusNode
Didn't know it?
click below
 
Knew it?
click below
Don't know
Remaining cards (0)
Know
0:00
share
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 5th year

Chemistry Ms. Lennon

QuestionAnswer
Dalton's Atomic Theory Daltons Atomic Theory may be stated as follows, 1. All matter is made up of very small particles called atoms. 2. All atoms are indivisible. They cannot be broken down into simpler particles.
Crookes Cathode ray experiments - Maltese cross - Paddle wheel
Thompson -Discovered electron -e/m formula
Stoney He coined the name 'electron'
Miligan Oil drop experiment discovered charge of electron
Rutherford Bombarded small particles with alpha particles (helium nucleus, 2protons and 2 neutrons) and discovered small positively charged particles were given out , protons.
Rutherford Gold foil experiment, Discovered nucleus and put forward the idea of an atom as having a dense positively charged nucleus and an electron cloud surrounding the nucleus.
Chadwick Bombarded beryllium with alpha particles and discovered that neutral charged particles were released called neutrons.
Name equipment to view emission spectra Spectrometer and spectroscope.
Salt colours -flame test Lithium Crimson
Salt colours -flame test Potassium Lilac
Salt colours -flame test Barium Green
Salt colours -flame test Strontium Red
Salt colours -flame test Copper Green/blue
Salt colours -flame test Sodium Yellow
What is an energy level An energy level is defined as the fixed energy value that an electron in an atom may have.
Ground state The ground state of an atom is one in which the electrons occupy the lowest available energy level.
Excited state The excited state of an atom is one in which the electrons occupy higher energy levels that those available in the ground state.
E2-E1 = Hf E2 = Excited state, E1 = ground state, H = Planck's constant f = frequency
Heisenberg's uncertainty principle States that it is impossible to measure at the same time both the velocity and the position of the electron
An orbital is a region in space within which there is a high probability of finding an electron
A sublevel A sublevel is a subdivision of a main energy level and consists of one or more orbitals of the same energy.
Created by: mlennon
 

 



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