Part 2 Flashcards
Process of loosing energy to reach the stable state
Radioactivity
They disintegrate or undergo nuclear transformation spontaneously and in random process called
Radioactivity
Discovered in 1896 by the French scientist Antoine Henri Becquerel along with Marie Sklodowska-Curie and Pierre Curie.
This process is called radioactive integration or radioactive decay
Is the emission of particles and energy in order to become stable
Radioactivity
Results in emission of alpha particles, beta particles and gamma rays
Radioactive decay
Discovered the radioactivity in 1896
Henri Becquerel(1852-1908)
He “noted that a piece of mineral containing uranium” when placed over an exposed photographic plate just as if it has been exposed to light.
Henri Becquerel(1852-1908)
“The blackening of the photographic plate” was due not to light but to a radiation being emitted by the uranium mineral.
Henri Becquerel (1852-1908)
Discovered that polonium and radium also emit radiation
Pierre and Marie Curie(1867-1924)
SI derived unit of energy of radioactivity
Becquerel(Bq)
Traditional unit of radioactivity is
Curie(Ci)
Try to balance their energies by giving off excess protons/neutrons to achieve stability
Unstable Nuclei
“is the emission of electromagnetic radiation of an extremely high frequency” i.e. very high energy, giving out excess energy in order to stabilize the unstable nucleus.
Gamma decay
Are photons and are without mass or change
Gamma rays
Types of Half-Life
Biological- inside a living body
Physical- time required for RAM to reduced to 1/2
Effective- TbxTb/Tb+Tp
