Definition

1. Noun:
   • A chemical element: "atomic number 31" is the scientific identifier for the metallic element gallium. It refers specifically to the number of protons in the nucleus of one atom of this element, which defines its identity on the periodic table.
   • A specific property: The term denotes the ordinal number (31) representing the element's position in the periodic table, directly correlated with its proton count.

Usage Examples

• Noun:
  • Gallium is identified by its atomic number 31.
  • The element with atomic number 31 is a post-transition metal.
  • In the periodic table, atomic number 31 falls between zinc and germanium.

Advanced Usage

• In scientific notation: Often represented simply as "Z=31" in physics and chemistry contexts, where Z stands for atomic number.
  • The isotope's properties are determined by its atomic number 31 and neutron count.
• As a defining characteristic: Used to distinguish the element from all others, regardless of its state or compound form.
  • Any atom containing 31 protons in its nucleus, by definition, has atomic number 31 and is gallium.

Variants and Related Words

• Gallium (n): The common name for the element with atomic number 31.
  • Gallium (atomic number 31) has a low melting point.
• Ga (n): The standard chemical symbol for gallium (atomic number 31).
  • Ga is the symbol for the element with atomic number 31.

Synonyms

• Gallium: The direct synonym, being the element's name.
• Element 31: An alternative numerical designation.
• Z=31: A technical synonym used in scientific fields.

Related Phrases

• Atomic number: The more general term of which "atomic number 31" is a specific instance.
  • The concept of atomic number is fundamental; for example, atomic number 31 defines gallium.
• Group 13, Period 4: Its periodic table classification, often mentioned alongside its atomic number.
  • Atomic number 31 corresponds to an element in Group 13 and Period 4.

Noun

1. a rare silvery (usually trivalent) metallic element; brittle at low temperatures but liquid above room temperature; occurs in trace amounts in bauxite and zinc ores