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

Radiation & HalfLife

cava chem 303 s2d79 8.02 Radiation and Half-Life

QuestionAnswer
Radioactivity is the decay of an unstable atomic nucleus, followed by the release of [...]. Radioactivity is the decay of an unstable atomic nucleus, followed by the release of radiation.
Quarks attract one another via the [...] nuclear force. Quarks attract one another via the strong nuclear force.
Neutrons help [-ize] the nucleus. Neutrons help stabilize the nucleus.
Unstable nuclei [...] to become stable. Unstable nuclei decay to become stable.
alpha emission – emits a [...] nucleus (2 protons, 2 neutrons aka: alpha particle), often released from a large atom alpha emission – emits a helium nucleus (2 protons, 2 neutrons aka: alpha particle), often released from a large atom
beta emission – emits a high-speed [...] or [...] ([...]) from the nucleus (not from the orbitals) beta emission – emits a high-speed electron or positron (antielectron) from the nucleus (not from the orbitals)
gamma emission - emits an [...] [...] gamma emission - emits an electromagnetic wave
[...] particles can be stopped by paper or skin alpha particles can be stopped by paper or skin
[...] particles can be stopped by aluminum foil or Plexiglas beta particles can be stopped by aluminum foil or Plexiglas
[...] emissions can be stopped by concrete or lead gamma emissions can be stopped by concrete or lead
The half-life (t1/2) of a radioisotope is the amount of time required for [...] of the radioactive nuclei of the parent substance to decay into the daughter substance(s). The half-life (t1/2) of a radioisotope is the amount of time required for one-half of the radioactive nuclei of the parent substance to decay into the daughter substance(s).
Half Life: fraction remaining (FR) = [...] (n = number of half-lives) Half Life: fraction remaining (FR) = 0.5^n (n = number of half-lives)
Created by: mr.shapard
 

 



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