Exam 2 🙃 Flashcards
Alpha particle
Beta particle
Positron particle
Alpha 4:2
Beta 0:-1
Positron 0:1
Above line in blue
Below line in orange
Point at start of alpha decay of protons
Beta decay above
Positron emission below
82 protons and about 126 neutrons
Rate of half life
Is A=kN
Helpful formulas you can find k from and N is number of atoms
A is normally bq which is atom decentegration per second
Mass defect
Products - reactants
Fusion vs fission delta H
Both have -delta H and are highly exothermic
Important units to remember in E=mc2
E is In Jules
M is kilograms
C is on equation sheet
Nuclear mass vs isotope mass
Nuclear mass excludes electrons
Most radioactive stable is
Fe
Smaller then Fe is fusion.
Larger is fission.
Dose of radiation
J/kg
Q= Dx/Dr
Dx is reference dose gama in Gy or in J/kg
Dr is dose of r that causes same as gama
Sv=QxGy
Is the amount of damage measured in sieverts
LD50 lethal dose for 50% of pop
Keq units
It is unitless and is measured in activities which is x/1M or x/1atm
For pure solids and liquids activity is = 1
K and Q which direction shift
k>q shift to the right
K<Q shift to the left
Calculate delta h of reaction from standard enthalpies
Calculate delta g from standard
Sum of products - sum of reactions
Standard conditions
25degreee Celsius
Standard pressure 1 atm
Standard concentration 1 M
Non standard conditions
Delta G= delta g non standard + RTlnQ
Which if applied to a table of standard conditions allows us to predict q
Equation not on equation sheet
lnK=-deltaH/RT + delta S/R
