atomic number 3
Definition
- Noun:
- A chemical element: "atomic number 3" is the systematic name for the chemical element with three protons in its atomic nucleus. It is a soft, silver-white, highly reactive metal belonging to the alkali metal group and is the lightest known metal. It occurs naturally in various minerals.
Usage Examples
- Noun:
- The battery uses a compound containing atomic number 3.
- Atomic number 3 is essential for certain psychiatric medications.
Advanced Usage
- Scientific Context: The term "atomic number 3" is primarily used in systematic scientific nomenclature, particularly in chemistry, physics, and materials science, to specify the element unambiguously by its proton number.
- The isotope of interest was lithium-7, an isotope of atomic number 3.
Variants and Related Words
- Lithium (Li): The common name for the element with atomic number 3.
- Lithium is the common name for atomic number 3.
- Alkali metal: The group of elements to which atomic number 3 belongs.
- Atomic number 3 is the first member of the alkali metal series.
Synonyms
- Lithium: The standard, non-systematic name for the same element.
Related Phrases
- Atomic number: The number of protons in an atom's nucleus, which defines a chemical element.
- The concept of atomic number is fundamental; for instance, atomic number 3 defines lithium.
Noun
-
a soft silver-white univalent element of the alkali metal group; the lightest metal known; occurs in several minerals
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