Nuclear Chemistry Flashcards
Definition of radioactivity
Radioactivity is the result of unstable nuclei emitting energy or a particle to form stable nuclei.
Information about alpha particles.
Slow moving
Positively charged
2 protons and 2 neutrons
Stopped by spice of paper
Information about beta particle
Fast moving
Negatively charged
Stopped by thin metal foil
Info about gamma
Form of high energy electromagnetic radiation.
Stopped by concrete
No charge
What is the equation of alpha and beta particles
- 2+
2 He - -
- 1 e
What is the definition of half life
The time it takes for the atoms of the starting element to change into the new isotope.
What is the mass and charge of alpha particles
Mass is 4
2+
What is the charge and mass of beta particles
-1
Mass is 0
What is the charge of gamma
0
How far can the radioactive particles travel
Alpha - few cm
Beta - 1metre
Gamma - unlimited
What do the A and the Z stand for in general formulas
A is the mass no.
Z is the atomic no.
Write out the general formula for the alpha decay emissions
A. A-4. 4
Z (X) -> Z-2 (Y) + 2He
What is the general formula for the beta decay emission equations.
A. A. 0
Z (X) -> Z+1 (Y) + -1 E
Write the alpha dacay for one of these elements
226
88. Ra
234
92. U
221
83. Bi
204
84. Po
224
86. Rn
Check jotter
Write the beta decay for one if these elements
218
84. Po
234
90. Th
90
38. Sr
32
15. P
63
28. Ni
Check jotter
