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.
Don't know
Know
remaining cards
Save
0:01
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:
Retries:
restart all cards
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

BJU Chem Test 4

QuestionAnswer
first to refer to matter as being made up of discrete particles Democritus
describes how any sample of water contains 8 g of oxygen for every 1g of hydrogen law of definite composition
first model to include to include different masses of different elements Dalton's model
Thomson's cathode rays were electrons
subatomic particle with least mass electrons
credited with the discovery of the neutron James Chadwick
first identified and named the proton Ernest Rutherford
helped to explain line spectra Niels Bohr
energy emissions in certain quantities due to energy levels being quantized
states that it is impossible to know the energy and the exact position of an electron at the same time Heisenberg uncertainty principle
Louis de proposed wave nature of electrons
type of sublevel found in all principal energy level s sublevel
max # of electrons in a 3p orbital 2
total electron capacity of the third principal energy level 18
max # of electrons in a 4d sublevel 10
2 different isotopes of a single element would have the same number of _______ but a different number of _______ protons, neutrons
sum of the number of neutrons and the number of protons is known as mass number
determined by the weighted averages of isotopes of an element atomic mass
# of unpaired electrons are in a nitrogen atom 3
if an atom loses an electron, the atom will have, what kind of charge positive
Created by: cba2012