As a natural chemical element plutonium exist only in traces in uranium ores. A not important today contamination of soils, waters and atmosphere is derived from nuclear weapons tests and nuclear facilities accidents.
Plutonium is normally solid and metallic.
500 Degrees kelvin.
At room temperature plutonium is a solid metal.
The most common plutonium isotope is plutonium 239.
Plutonium is a member of the actinoids family and in period 7 of the periodic table of Mendeleev.
Plutonium can be released as waste from nuclear power plants and can be sold on the black market to make other nuclear devices.
Occurances
occurence should be OCCURANCE NO- occurence should be OCCURRENCE
Excepting accidents and nuclear weapons tests plutonium don't exist in air (or the concentration is too low to be measured).
An incident is an event or occurence.
the occurrence had me shivering.
the three types of rocks are classifed based on theire mode of formation or occurence where, they are formed but not of the todays occurence.