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Definitions from WordNet
Noun atomic number 87 has 1 sense
- francium, Fr, atomic number 87 - a radioactive element of the alkali-metal group discovered as a disintegration product of actinium
--1 is a kind of metallic element, metal
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Definitions from the Web
Atomic Number 87
Definition: Atomic number 87 refers to the number of protons found in the nucleus of an atom of an element called francium. It is a unique identifier for francium in the periodic table.
Senses/Usages:
- Chemistry Sense: In chemistry, atomic number 87 is used to identify and differentiate francium from other elements. Francium, with its atomic number of 87, is the second rarest natural element on Earth.
- Scientific Research Sense: Atomic number 87 plays a significant role in scientific research involving the study of radioactive elements and their properties, as francium is highly radioactive.
- Academic Sense: Atomic number 87 is taught in educational institutions to familiarize students with the periodic table and the unique characteristics of francium as an element.
Sample Sentences:
- Francium, with an atomic number 87, is known to have the highest equivalent weight of any element.
- Using a mass spectrometer, scientists can accurately determine the atomic number 87 of an unknown radioactive sample.
- Learning about atomic number 87 and its significance in chemistry is crucial for understanding the properties of francium.
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