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

Atom

TermDefinition
Atom Basic unit of chemical element
Electrons Subatomic particle with negative charges
Protons Subatomic particle with positive charges
Neutron Subatomic particle with neutral charges
Nucleus Central part of atom with protons and neutrons
Atomic number Number of protons in the nucleus of an atom
Atomic Mass Mass of an atom of chemical element
Mass number Total number of protons and neutrons in a nucleus
Isotope same form of an element with different number of neutrons
Average Atomic Mass Sum of masses of an element's isotopes multiplied by its natural abundance
Radioactivity Emission of Ionizing radiation or particles caused by disintegration of the nuclei
Alpha Particle A helium nucleus emitted by radioactive substances
Beta Particle Fast moving electron emitted by radioactive substances
Gamma ray Penetrating electromagnetic radiation
Half-Life Time taken for radioactivity of an isotope to fall to half its original value
Fission Diving or splitting something into two or more parts
Fusion Process or result of joining two or more things to form a single unity
Critical Mass Amount of starting material that makes each fission reaction produce at least on more fission reaction
Chain Reaction A series of fission reactions caused by neutrons released in each reaction
Tracer Radioactive isotope used to find or keep track of a molecule
Created by: Dante T.
 

 



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