atomic number 111

9.5

A radioactive metal element called roentgenium whose atoms have 111 protons

noun

Specialized

: número atómico 111

The element with atomic number 111 is roentgenium.

Examples

The extremely short half-life makes atomic number 111 difficult to study in detail.
Scientists first synthesized atomic number 111 in 1994.
Few compounds of atomic number 111 have been investigated due to its rarity.
Scientists are studying atomic number 111 for its potential uses.
Few compounds of atomic number 111 have been investigated due to its rarity.
Scientists first synthesized atomic number 111 in 1994.
The element with atomic number 111 is known as roentgenium.

Synonyms

vsatomic number 111

Specialized

1 9.9

A chemical symbol for roentgenium, a very unstable radioactive element

is the longer numeric designation rather than a brief letter symbol

element 111

vsatomic number 111

Specialized

9.6

A very heavy radioactive metal made in labs that has very unstable atoms

is a numeric label used instead of the formal name for the same substance

roentgenium

vsatomic number 111

Specialized

9.9

A very heavy radioactive element made by scientists in a lab

is the numeric designation used instead of the standard name

Surface Forms

atomic number 111 singular

atomic numbers 111 plural

Morphology

atomic + number + 111

The phrase is compositionally transparent: 'atomic' (relating to atoms) + 'number' (a numeric identifier) + the numeral '111' directly denotes the element with that atomic number (roentgenium). Although technical, the naming logic is regular and cross-linguistically common, so a B1 learner who knows the constituent words and numerals can infer the meaning.

Etymology

Atomic number 111 names the chemical element that has exactly 111 protons in its atoms. So, saying atomic number 111 means the specific element 'roentgenium', a very rare, short-lived radioactive metal.