atomic number 5

Thân thiện

A scientist points to the atomic number 5 on a large, clear periodic table poster.

Definition

Noun: 1. The chemical element Boron: A trivalent metalloid element with the symbol B and atomic number 5. It occurs in nature both as a hard, black crystalline solid and as a brown or yellow amorphous powder.

Usage

• Atomic number 5 is the definitive identifier for the element boron on the periodic table. It specifies the number of protons in the nucleus of a boron atom.
• This term is primarily used in scientific, technical, and educational contexts related to chemistry and physics.

Examples

• The element with atomic number 5 is essential for the cell walls of plants.
• On the periodic table, atomic number 5 is found between beryllium (4) and carbon (6).
• The isotope boron-10, which has atomic number 5, is used in nuclear reactor control rods.

Advanced Usage

• In nuclear physics: The atomic number (Z) is a fundamental property. For atomic number 5, Z=5, which defines all boron isotopes regardless of their neutron count (e.g., boron-10, boron-11).

Variants and Related Words

• Boron (B): The common name for the element identified by atomic number 5.
• Metalloid: A category of elements, including boron (atomic number 5), that have properties intermediate between metals and nonmetals.
• Trivalent: Describing an atom with a valency of three, like boron (atomic number 5), which typically forms three bonds.

Synonyms

• Boron
• B (the chemical symbol)

Related Phrases/Idioms

(This term is a precise scientific identifier and is not used in idiomatic expressions.)

Học thuật

Noun

1. a trivalent metalloid element; occurs both in a hard black crystal and in the form of a yellow or brown powder

Từ đồng nghĩa

• boron
• B