What is an isotope
2 or more forms of the same chemical element. Atoms of the same component and different mass numbers
How to find the atomic mass
Protons + Neutronos
The number of protons is the same as
The atomic number
How to tell isotopes of the same element apart
They have different neutrons
2 things to find if an isotope is stable
Neutron to proton ratio is close to 1:1
Atomic number less than 83
Radioisotopes definition
An unstable form of a chemical element that releases radiation as it breaks down and becomes more stable.