atomic number 87

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Thân thiện
Definition

Noun: - A radioactive element of the alkali-metal group discovered as a disintegration product of actinium: This is the scientific definition for the chemical element with 87 protons in its nucleus. It is a highly unstable, naturally occurring radioactive metal.

Usage

This term is used almost exclusively in scientific contexts, particularly in chemistry and physics, to refer to this specific element. - Francium is the element with atomic number 87. - Atomic number 87 is one of the rarest elements naturally found on Earth.

Advanced Usage
  • The term is used to precisely identify the element by its fundamental property (the number of protons), which determines its position on the periodic table and its chemical identity.
  • It is often used in contrast to the element's name ("francium") in educational or technical writing to emphasize its defining atomic characteristic.
Variants and Related Words
  • Francium (Fr): This is the name of the element represented by atomic number 87.
  • Alkali metal: The group in the periodic table to which atomic number 87 belongs.
  • Radioactive element: A category describing elements like atomic number 87 that spontaneously decay.
Synonyms
  • Francium
  • Element 87
  • Fr (its chemical symbol)
Notes
  • There are no idioms or phrasal verbs associated with this specific scientific term. Its usage is strictly technical.
Noun
  1. a radioactive element of the alkali-metal group discovered as a disintegration product of actinium

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