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

Radioactivity

Radioactivity Definitions for LC

QuestionAnswer
Radioactivity The spontaneous breaking up of unstable nuclei with the emission of one or more types of radiation
What happens when an atom loses an alpha particle? It changes into an atom of the element two places before it in the periodic table The mass number of the parent atom decreases by four
The half-life of an element is The time taken for half of the nuclei in any given sample to decay
When an atom loses a beta particle? It increases its atomic number by 1. The mass number stays the same.
Name an Alpha source Americium - 241
Name a Beta Source Carbon - 14
Name a Gamma Source Cobalt - 60
What is a Nuclear Reaction Its a process that alters the composition, structure or energy of an atomic nucleus
Polonium and Radium were discovered in 1898 by? Marie and Pierre Curie
The word "Radioactive" means? Giving off of Rays
An Alpha Particle consists of? Two protons and Two Neutrons stuck together
Alpha Particles Properties Slow Moving Low Penetrating Power - few cms of air or a sheet of paper
Beta Particle Properties Fast Moving Electrons Lighter than Alpha Particles More penetrating than Alpha Particles - 5 mm of Aluminium
Gamma Radiation Properties High Energy Electromagnetic Radiation similar to X - Rays travelling at the speed of light. Not deflected by Electric or magnetic fields Very High Penetrating ability. Only stopped by thick slab of Lead Cancer Causing. Can be used to kill cancer.
The changing of one element into another is known as? Transmutation
What is a Radioisotope A Radioactive Isotope
Radioisotope Medical Use Kills Cancerous Cells = Radiotherapy Sterilising medical instruments Iodine - 131 used to study Thyroid gland
Radioisotope Archaeological Use Used for Carbon dating using a ratio of C - 12 to C - 14 (Radiocarbon Dating)
Radioisotope Agricultural Use Measuring the uptake of Phosphorus by Plants using P - 32
Radioisotope Food Irradiation Use Kills disease carrying organisms. Herbs and Strawberries. Not suitable for all foods, e.g. Red Meat
Radioisotope Smoke Alarms Use Americium - 241 alpha particles are blocked by ash particles setting of
Backround Radiation Radiation in the environment coming from natural sources
Radiation was discovered by? Henri Becquerel
Who discovered Polonium and Radium? Marie and Pierre Curie
Created by: p-furl1
 

 



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