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Glite Dictionary
atomic number 87

atomic number 87

9.8
A very rare metal called francium that is highly radioactive
  • noun
  • /əˈtɑːmɪk ˈnʌmbər ˈeɪtiˈsɛvən/
  • Specialized
translation icon : francio
  • The atomic number 87 corresponds to francium.

Examples

  • Scientists rarely work with atomic number 87 because it is extremely unstable and radioactive.

  • The discovery of atomic number 87 added a new element to the periodic table.

  • Due to its scarcity, atomic number 87 has limited practical applications in research.

  • Can you explain atomic number 87?

  • Scientists rarely work with atomic number 87 because it is extremely unstable and radioactive.

  • Due to its scarcity, atomic number 87 has limited practical applications in research.

  • The atomic number 87 corresponds to francium.

Synonyms

Fr
vsatomic number 87
  • Specialized
5 9.9

A chemical symbol for francium, a very rare radioactive metal

refers to the element by its name rather than the short symbol
francium
vsatomic number 87
  • Specialized
1 9.9

A very rare metal that is highly radioactive and exists only in tiny amounts in nature

has the same meaning but refers to the element by a numeric label

Surface Forms

atomic number 87 singular
atomic numbers 87 plural

Morphology

atomic + number + eighty-seven

The constituents 'atomic' + 'number' + 'eighty-seven' transparently indicate a numerical identifier related to atoms (i.e. an atomic identifier with value 87), so learners will grasp it refers to an atomic/chemical label. However, mapping that identifier to the specific element name 'francium' requires background knowledge of the periodic table, so the full referent is not predictable from the words alone.

Etymology

Atomic number 87 names the element 'francium'. The label atomic number tells you how many protons an atom has and the number 87 means 87 protons, so atomic number 87 points to the rare, very radioactive metal 'francium'.