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.

Remove Ads
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

Chapter 4 Vocabulary

Vocabulary from chapter 4 of textbook

QuestionAnswer
Cathode Ray Ray of radiation that originates from the cathode end of the tube.
Electron negatively charged subatomic particle.
Nucleus small dense and centrally located within the atom. Contains all the atom's positive charge and virtually all of its mass.
Proton positively charged subatomic particle.
Neutron neutrally charged subatomic particle.
Table O illustrates the symbols, charges and masses of subatomic particles and nuclear emanations.
Atomic Number The number of protons in the nucleus of an atom. Identifies the atom.
Isotope Atoms with the same number of protons (atomic number) but different number of neutrons (mass number)
Mass Number The sum of the protons and the neutrons in the nucleus of an atom.
AMU Atomic Mass Unit - 1/12 the mass of a carbon-12 atom.
Atomic Mass The weighted average mass of all naturally occurring isotopes of an element.
Nucleons The subatomic particles found in the nucleus (protons and neutrons).
Nuclear Reactions A reaction that involves a change in an atom's nucleus.
Radioactivity A process occurring when a substance spontaneously emits radiation.
Radiation The rays and/or particles emitted by a radioactive material.
Radioactive Decay Occurs when unstable nuclei lose energy by emitting radiation in a spontaneous process.
Alpha Radiation Radiation deflected towards a negative plate.
Alpha Particle A particle with 2 protons and 2 neutrons.
Nuclear Equation illustrates the mass number and atomic number for each particle involved.
Beta Radiation Radiation deflected towards a positive plate.
Beta Particle A particle with negligible mass and a negative charge.
Gamma Ray High energy radiation that possess no mass or charge.
Created by: Silvs216