RT PROCH Flashcards
NP- P
DIVIDE
P TO NO
multiply
P TO P
multiply then divide
SAME NU,BER OF PROTONS AND ELECTRONS - ATOMIC NUMBER (DOWN)
isotoPes
SAME ATOMIC MASS (UP)
isobArs
NEUTRONS- SUBTRACT
isotoNes
SAME ENERGY LEVELS m = METASTABLE
isomErs
DISCOVERED BY HENRI BECQUEREL AND WHAT YEAR
RADIOACTIVITY, 1896
BECQUEREL WAS AWARDED HALF OF THE NOBEL PRIZE IN PHYSICS IN WHAT YEAR
1903
UNSTABLE OF EMITTING RADIATION SPONTANEOUSLY TO REACH MORE STABLE STATE
AND ALSO TERMED AS WHAT?
Radioactive atoms or radioactive materials
OLD SI UNIT OF RADIOACTIVITY
CURIE
1 Ci is EQUIVALENT TO HOW MUCH Bq
3 .7 x 10 raise to the power of 10
marie curie also discovered what
polonium and radium
A fraction of percentage of original number of atoms decaying per unit time
Decay disintegration transform constant
Decrease by 1/2 of it’s original state also known as elimination of life
Biological half life
Combination of radioactive decay and biologic excretion
Effective half life
Average time required for the decay of half the atoms each amount of radioactive substance
Physical half life
-Occurs in heavy nuclides with high atomic number
- 4 atomic mass and 2 atomic number
Alpha emission/(a) decay
Low penetrating power - most harmful internally - less harmful externally
Alpha emission