Radioactive elements are able to ionize the air.
All elements have a useful purpose, including the synthetic actinides that have half-lives measured in milliseconds.
For example some useful isotopes: 241Am, 242mAm, 243Am.
Density is the least useful property for identification because different specimens of the same type of mineral can vary in size. -Color is the least useful property for identification because it is the most obvious property.
Speed detectors,Radio,Automobiles,guns,speed traps,DNA checkers
If it is a guard dog it guards property, that is useful.
This depends on your needs !
to be awsome
The property most useful for the identification of sulfur is its characteristic smell, often described as similar to that of rotten eggs.
When looking to buy a radar dectector, it is useful to know the range of detection. Most radar detectors can detect upto 2.5 miles. Some better models can even read upto 8 miles away.
The property that makes semi-metals useful as "switches" is that their varying ability to conduct electricity.
because its hard
The property that makes semi metals useful as "switches" is that their varying ability to conduct electricity.