Save
Busy. Please wait.
Log in with Clever
or
show password
Forgot Password?
Don't have an account?  Sign up 
Sign up using Clever
or
Username is available taken
show password


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. Your email address is only used to allow you to reset your password. See 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
edit
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

Chem Final Chap 19

TermDefinition
Alpha particle A helium nucleus produced in radioactive decay
Beta particle An electron produced in radioactivity
Gamma particle A high energy photon produced i radioactive decay. 0 charge,no mass
Radioactive decay When nuclei spontaneously decompose forming a different nucleus and producing one or more particles
Radioisotope An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable
Fission Splitting a heavy nucleus into two nuclei with smaller mass numbers.
Fusion Combining two light nuclei to form a heavier nucleus.
Geiger counter An instrument that measures the rate of radioactive decay by registering the ions and electrons produced as radioactive particle passes through a gas filled chamber.
Half-life The time required for half of the original sample of radioactive nuclides to decay.
Critical mass The mass of fissionable material required to produce a chain reaction
Chain reaction A self-sustaining fission process caused by the production of a neutrons that produced to split other nuclei
Nucleons A particle in an atomic nucleus, either a neutron or a proton
Positron A particle that has the same mass as an electron but with a positive charge
Nuclear transmutation The conversion of one chemical element or an isotope into another chemical element
Radiotracers A radioactive nuclide introduced into an organism and tarced for diagnostic purposes
Explain the cathode ray experiment and the discovery of an electron Thomson was able to deflect the cathode ray towards a positively charged plate deduce that the particles in the beam were negatively charged.
Explain Rutherford's Gold Foil experiment and what is discovered. It discovered that the atom had a dense positive core. When Ernest shot a beam of alpha particles at a sheet of golf foil,a few of the particles were deflected. He concluded that a tiny,dense nucleus was causing the deflections.
Ernest Rutherford Gold foil experiment and discovered that the atom has a dense positive nucleus
John Dalton Discovered the Atomic theory 1-Elements are made up of atoms 2-All atoms in a given element are identical 3-Atoms from a given element are different fromother element 4-Atoms of a given element can combine with others 5-All atoms are indivisible
JJ Thomson Used the cathode ray tube to discover electrons
William Thomson Discovered the Plum Pudding model and thought electrons were combined with positive charges.
Neils Bohr Discovered the planetary model and thought that electrons circled around the positive nucleus of an atom like planets
Place them in chronological order 1-John Dalton 2-Cathode ray tube 3-Plum Pudding 4-Nucleus atom
Write the isotope fro Carbon-13 13C 6
Write the hyphen notation for the element that contain 15 electrons and 15 neutrons Phosphorus-30
What particle is represented by 4HE ? 2 Alpha particle
What particle is represented by 0 e ? -1 Beta particle
What particle is represented by 0 e ? 1 Positron
What particle is represented by 1 n ? 0 Neutron
What particle is represented by 1 H ? 1 Proton
Would you use a radiotracer with a long or short half life for medicinal purposes? Explain why Short, because a radioisotope used for diagnosis must emit gamma rays of sufficient energy to escape from the body and it must have a half life short enough for it to decay soon.
What element id the death sentence of a star? Iron
Rank the three processes (fission,fusion, radioactive decay) from produces the most energy to the least amount. Fusion, Fission, and radioactive decay
Give an example of an element that would be produced during a star's life and explain why. Carbon, In massive stars, hydrogen burns to form helium. This produces Carbon,
Write the isotope notation for Uranium-235. 235 U 92
How many protons does Uranium-235 have? 92
How many neutrons does Uranium-235 have? 143
Created by: JuliR
Popular Chemistry sets

 

 



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