Definition

1. Noun:
   • The chemical element with the number 6 in the periodic table: This is the scientific identifier for the element carbon. It refers to an abundant, nonmetallic, tetravalent element that occurs in several distinct physical forms (allotropes), including amorphous carbon, graphite, and diamond. It is a fundamental component of all known organic compounds.

Usage

• The term "atomic number 6" is used primarily in scientific, technical, and educational contexts to specify the element carbon by its defining property—the number of protons in its nucleus.
• It is often used to avoid ambiguity when discussing elemental properties or the periodic table.

Examples

• Noun:
  • The substance was analyzed and found to contain a high proportion of atomic number 6.
  • On the periodic table, atomic number 6 is positioned between boron (5) and nitrogen (7).

Advanced Usage

• In nuclear chemistry: The atomic number defines the element. Therefore, any atom with 6 protons is, by definition, atomic number 6 (carbon), regardless of its neutron count (isotope).
  • Carbon-12 and carbon-14 are both isotopes of atomic number 6.

Variants and Related Words

• Carbon (C): The common name and chemical symbol for atomic number 6.
  • Graphite and diamond are pure forms of carbon (atomic number 6).
• Allotrope: A different structural form of the same element, such as the amorphous, graphite, and diamond forms of atomic number 6.

Synonyms

• Carbon: The direct and most common synonym.
• Element 6: An alternative scientific designation.

Related Phrases/Idioms

• : A common metaphorical phrase for carbon (atomic number 6), referring to its essential role in all organic molecules.
  • Atomic number 6 is often called the building block of life due to its presence in all living organisms.

Noun

1. an abundant nonmetallic tetravalent element occurring in three allotropic forms: amorphous carbon and graphite and diamond; occurs in all organic compounds