MODES OF DECAY Flashcards
(93 cards)
RADIOACTIVITY was first discovered by him in 1896
Henry Becquerel
A phenomenon in which radiation is given off
by the nuclei of the elements
RADIOACTIVITY
particles or electromagnetic radiation
RADIOACTIVITY
Process of spontaneous disintegration of
unstable nuclide accompanied by emission
of either particulate or electromagnetic
radiation
RADIOACTIVITY
the number of atoms disintegrating per unit
time, which is proportional to the number of
radioactive atoms present
DECAY CONSTANT
Number of atoms that will disintegrate per
unit time
decay constant
what are the conditions for nuclear instability?
Neutron/proton ratio is increased
Neutron/proton ratio is decreased
Excess number of nucleons
n with atomic mass of 1 and 0 charge? what’s this?
NEUTRON
e with atomic mass approximately 0 and with
negative charge of 1
electron
Identical with the electron but with positive
charge of 1
beta plus or positron
Identical with the electron but it originate
from the nucleus
BETA MINUS OR NEGATRON
p with atomic mass of 1 and positive charge
of 1
PROTON
Identical with the hydrogen element
proton
With atomic mass of 4 and atomic number of
2
ALPHA PARTICLE
Identical with the Helium element
alpha particle
No mass, No Charge, excess energy and
emitted with Beta Emission
neutrino or antineutrino
what are the RADIOACTIVE DECAY PROCESS/MODES OF
RADIOACTIVE DECAY? 5 kabuok
⚫ Alpha particle decay
⚫ Beta particle decay
⚫ Electron capture
⚫ Internal conversion
⚫ Isomeric transition
Radioactive nuclides with a very high atomic
numbers greater than 82 or atomic mass of
150 most frequently undergo Alpha emission
alpha particle decay
Radioactive nuclides with a very high atomic
numbers greater than __ or atomic mass of
___ most frequently undergo ____
80, 150, aplha emission
Alpha particle emission has an excess
number of_______
protons and neutrons or nucleons
It emits 2 protons and 2 neutrons
alpha particle decay
Atomic mass decreased by 4 while the
atomic number decreased by 2
alpha particle decay
Ra with A (___) Z(____) will transform into Rn
with A (222) Z(86) + ______ + _____ MeV
226, 88, helium, 4.87
Rn A (__) Z (_____) will transform into Po A (216) Z
(84) + ____ + _____ MeV
220, 86, helium, 6.4