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

Atomic

Regents Chem - atomic theory

QuestionAnswer
Proton subatomic particle with a positive charge and mass of 1 amu. Found inside the nucleus.
Neutron subatomic particle with neutral charge and a mass of 1 amu. Found inside the nucleus.
Nucleon protons and neutrons (found inside the nucleus)
Electron subatomic particle with a negative charge and no significant mass (1/1836 amu). Located outside nucleus
Orbital region outside the nucleus where you have a 90% probability of finding an electron
Mass number protons + neutrons. The top number in an elements notation.
Atomic number # protons
Isotopes same element (same # protons) but with different numbers of neutrons (different mass)
Ions elements that have a charge due to the gain or loss of electrons. Gaining electrons creates a negative ion
Ground state electrons are in their lowest energy levels (ie: magnesium, 2-8-2)
Excited State electrons are excited and at least one electron is in a higher than normal energy level (ie: magnesium 2-7-3)
Electron configuration lists the number of electrons in each energy level. Max #’s: 1st level: 2; 2nd level: 8; 3rd level: 18; 4th level: 32
Lewis (Electron) Dot Structure element symbol with dots around it, representing the valence electrons. 1st 2 electrons are paired and the rest fill uniformly.
Rutherford’s Gold Foil Experiment alpha particles (+2) were aimed at gold foil. Two things were proven: 1-the atom is mostly empty space; 2-there is a dense positive center (nucleus)
kernel everything but the valence electrons (nucleus + inner electrons)
Bohr Model model of the atom with the nucleus surrounded by energy levels containing the electrons
Wave Mechanical (Electron Cloud) Model current atomic model. Electrons are located in orbitals (where you have a 90% probability of finding an electron)
A negative ion has more electrons than protons
A positive ion has more protons than electrons
A neutral atom # protons same as # electrons
Created by: PRO Teacher etucci
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