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
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

particles atomic

atomic particles numbers and radiation

QuestionAnswer
The number of protons in an atom of an element. Atomic number.
An atom of the same element that has a different number of neutrons. Isotope.
The sum of the protons and neutrons in the nucleus of an atom. Mass number.
The average mass of an atoms Isotopes weighted according to the abundance of each Isotope. Average atomic mass.
This refers to an element that spontaneously emits radiation. Radioactive.
Occurs when and unstable nucleus changes into another more stable nucleus by emitting radiation. Nuclear decay.
Type of nuclear decay that emits a particle made of two protonas and two neutrons. Alpha particle.
Type of nuclear decay in which a particle made of one high energy electron is emitted and a neutron changes to a proton. beta
Type of nuclear decay that does not emit a particle. A high energy wave instead. Gama.
Positive particle found in nucleus of an atom. Proton
Neutral particle found in nucleus of atom. Neutron.
Negatively charged particle found in the electron cloud surrounding the nucleus of an atom. Electron.
Mass of a proton. 1 amu.
Mass of a neutron. 1 amu.
Mass of an electron. 1/1840 of one amu.
Atom with more or less electrons. Ion.
Atomic Mass Unit Unit of measure for atomic particles. Value is equal to the mass of 1 proton.
Created by: vbelfy