meitnerium

9.9

A man-made radioactive element that scientists make in a laboratory and do not find in nature

noun
/ˌmaɪtˈnɪr.i.əm/

Specialized

: meitnerio

The atomic number of meitnerium is 109.

Examples

Scientists were able to detect a few atoms of meitnerium during the experiment.
Scientists synthesized meitnerium in a laboratory.
Because meitnerium decays so quickly, it has no practical uses outside scientific research.
The periodic table lists meitnerium among the transactinide elements.
Due to its synthetic nature, meitnerium must be studied in controlled laboratory conditions.
Researchers recently announced the discovery of meitnerium after successfully synthesizing it in their lab.
In the realm of chemistry, meitnerium is classified as a transuranic element with distinct radioactive properties.

Synonyms

element 109

vsmeitnerium

Specialized

9.7

A very heavy radioactive metal made by scientists with atomic number 109

focuses on being synthetic and produced in laboratories rather than found naturally

atomic number 109

vsmeitnerium

Specialized

9.9

A very heavy radioactive metal that scientists make in labs and has atomic number 109

refers to the actual element with synthetic origin rather than only a number label

vsmeitnerium

Specialized

9.9

The chemical symbol for meitnerium, a very heavy radioactive element with number 109

refers to the actual synthetic element rather than its short symbol

Surface Forms

meitnerium singular

meitneriums plural

Morphology

meitnerium = Meitner (semi-transparent) = meitner + ium

Formed by adding the chemical element suffix '-ium' to the surname 'Meitner'; '-ium' signals an element but the root is a proper name rather than a lexical English word.

Etymology

Meitnerium is named after the physicist Meitner, with the common element ending -ium, like in einsteinium or curium. That's why meitnerium is the name for a man-made, radioactive 'element' made in laboratories with atomic number 109.