noun
- a radioactive metallic chemical element with the symbol Po and atomic number 84
Usage: chemistry
Examples
- Polonium was discovered by Marie and Pierre Curie in 1898.
- The element polonium is extremely radioactive and dangerous to handle.
- Polonium-210 is one of the most toxic substances known to science.
- Scientists study polonium in specialized laboratories with strict safety protocols.
- The half-life of polonium-210 is approximately 138 days.
- Polonium occurs naturally in uranium ores in very small amounts.