4b And C Flashcards
Activity (radiation v half life
Rate of radioactive decay per unit of time v time it takes for half radioactive sample to decay
Shorter half life
Isotope decays faster and is more unstable
Number of nuclei that decays in a given period of time is what to initial number of nuclei
Proportional therefore predictable
Equation for remaining nuclei
N
Relate mass to initial mass
M=m0 (1/2)^n
Amount of half life’s passed formula
N= T/t1/2
Rate a substance decays or activity at a given time formula
A
Alpha decay v alpha particle
Process where unstable nucleons decays into more stable nucleus by emitting an alpha particle ( helium particle
Beta minus decay v beta plus decay v beta paritcle
Process which unstable neutron decays into a more stable nucleolus by transforming a neutron to a proton by emitting an electron and antineutrino v proton to neutron emoting positron and neutrino ( electron ;bm or positron;bp)
Ionisation energy v ionising power
Energy required to remove electron from an atom v ability of a given type of radiation to cause another atom to lose electrons and become and ion
Nuclide v parent Nuclide
Nucleus with a specific number of neutrons and protons v original nucleons before radioactive decay occur
Penetrating power
an indicator of the extent in which a given type of radiation can penetrate matter before it loses it energy
Radiation
Transmission of energy in the form of electromagnetic waves or high speed particles
Changes in four decay
A: daughter mass is parent mass take 4
Daughter atomic number is parent atomic number take 2
Bm: mass same
One plus parent atomic number is daughter
Bp: same mass
Parent mass take one is daughter mass
Gd: same energy decreases
What do u need to remember
How to write the decay equations
