Definition

1. Noun:
   • A multivalent nonmetallic element of the nitrogen family: This term refers to a specific chemical element, commonly known as phosphorus. It is characterized by its position in the periodic table, its nonmetallic properties, and its ability to form multiple chemical bonds.
   • A key element in biological systems: It is a fundamental component of living cells, found in molecules like DNA and ATP, and is essential for energy transfer and genetic coding.

Usage Examples

• Noun:
  • The fertilizer is rich in atomic number 15, which is crucial for plant growth.
  • Scientists studied the role of atomic number 15 in the cell's energy cycle.

Advanced Usage

• In technical contexts: The term "atomic number 15" is primarily used in scientific, educational, and technical writing to specify the element precisely by its fundamental property (the number of protons) rather than its common name.
  • The isotopic composition of atomic number 15 was analyzed in the lab.

Variants and Related Words

• Phosphorus (P): The common name for the element with atomic number 15.
• Phosphate: A salt or ester of phosphoric acid, containing phosphorus.
• Phosphoric: Relating to or containing phosphorus.

Synonyms

• Phosphorus: The direct and most common synonym.
• Element P: A shorthand scientific reference.

Related Phrases

• Atomic number: The number of protons in the nucleus of an atom, which defines the element. "15" is the specific value for this element.
• Group 15 element: Refers to its classification in the nitrogen family (Group 15 or VA) of the periodic table.

Noun

1. a multivalent nonmetallic element of the nitrogen family that occurs commonly in inorganic phosphate rocks and as organic phosphates in all living cells; is highly reactive and occurs in several allotropic forms