Radio active isotopes are unstable isotopes of an element as there neutron number degenerate by emission of light or medium.
Four
Just about anywhere.
Radio-Activity was created in 1975-10.
Atomic Mass
geiger
isotops
radio activity was something she loved to study but she mainly kept her focuses on radium, or the radium institute.
radio activity?
Oxygen has 3 stable isotops found in the nature 16O (99,757%), 17O (0,038%), 18O (0,205%). There are also 14 other isotops made by humans, but the most stable one is 15O with a half-life of 122 seconds.
ruther ford
radio activity causes cancer
but