Atomic Number 87 (Noun)
Meaning
A radioactive element of the alkali-metal group discovered as a disintegration product of actinium.
Classification
Nouns denoting substances.
Examples
- Francium is a highly radioactive metal with an atomic number of 87 and an atomic mass of 223.
- The atomic number 87 element, francium, is a member of the alkali metal group.
- Francium, with the atomic number 87, is a highly unstable element that decays quickly into other elements.
- The discovery of francium in 1939 led to the identification of the element with atomic number 87.
- Research into the properties of francium, the element with atomic number 87, is challenging due to its highly radioactive nature.