Types Of Radioactivity Flashcards
2protons 2 neutrons Positively charged Mass of 6.64x10-24kg Can be blocked by paper Sometimes caked helium nucleus
Alpha particles
High energy electron Negatively charged Mass of 9.11x10-28 More energy than alpha Can also be called “electron” Can be blocked by thin foil
Beta particles
Electro magnetic radiation
No charge no mass
Cannot be blocked
Also called photon
Gamma ray
Radioisotopes
Isotopes with an atom with an unstable nucleus
Isotopes
Atoms with different number of nuetrons
Particles in the nucleus are balanced ratio to protons and nuetrons 1:1 (what is this atom classified as )
Stable atoms
Particles are unbalanced resulting in extra internal energy, atoms will realest particles with extra energy ( what is this atom classified as)
Unstable atom
Atomic number lowers by 2
Mass number lowers by 4
Describe this emission
Alpha emission
Mass number won’t change
Atomic number goes up by 1
Lose one negative beta particle
Beta emission
Fast moving electron leaves the nucleus mass number won’t change
Atomic number goes up by one
Beta emission
Proton is converted into a nuetrons and positron and one ore both leave the nucleus
Positron emission
The nucleus draws in a nearby electron which which then combines with a proton to form a nuetrons
Electron capture
When the nucleus goes from an excited state to a relaxed state, mass abs atomic number not changed
Gamma emission
The time it takes for half of the atoms of a radio isotope to decay ( into something else)
Half life
t1/2
Half life
