Busy. Please wait.

show password
Forgot Password?

Don't have an account?  Sign up 

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.
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.
Didn't know it?
click below
Knew it?
click below
Don't know
Remaining cards (0)
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

Intro Chem A Final

Matter Has mass and occupies space.
Cathode ray Glowing beam that traveled from cathode to anode.
Isotopes Atoms that have the same number of protons but different number of neutrons.
Atomic mass Element weighted average mass of atoms in a naturally occurring sample of the element.
Quantum Amount of energy required to move an electron from one energy level to another.
Aufbau principle Electrons occupy orbitals of lowest energy first.
Pauli exclusion principle Atomic orbital may describe at most two electrons.
Spin Quantum mechanical property of electrons.
Hund's rule Electrons occupy orbitals of same energy in a way that makes the number of electrons with the same spin direction as large as possible.
Amplitude Wave's height from zero to the crest.
Hertz SI unit of cycles per second.
Electromagnetic radiation Includes radio waves, microwaves, infrared waves, visible light, ultraviolet waves, X-rays and gamma rays.
Spectrum Sunlight passing through a prism separates them into different wavelengths.
Atomic emission spectrum Wavelengths of spectral lines are characteristics of the element.
Planck's constant (n) has value of 6.626 x 10^-34 J*s
Photoelectric effect Electrons are ejected when light shines on metal.
Heisenburg uncertainity principle States that it is impossible to know both velocity and position of a particle at the same time.
Radioisotopes Unstable isotope nuclear reactions begin with.
Alpha particle Two protons and neutrons has double positive charge.
Beta particle Electron result from breaking apart from a neutron in an atom.
Gamma Ray High energy photon emitted by radioisotope.
Nuclear Force Attractive force that acts between all nuclear particles that are extremely close together.
Band of stability Region of the graph in which these points are located.
Positron Particle with mass of an electron but a positive charge.
-Half-life Amount of time for substance to decay in half.
Transmutation Conversion of atom of one element into atom of another element.
Transuranium elements Elements with atomic numbers above 92.
Fission Nuclei of certain isotopes are bombarded with neutrons.
Neutron moderation Process that slows down neutrons so reactor fuel can capture them to continue chain reaction.
Neutron absorption Process that decreases the number of slow-moving neutrons.
Created by: MakStabs18



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:
restart all cards