atomic number 11

Thân thiện

Definition

1. Noun:
   • A chemical element: "atomic number 11" is the scientific term for the metallic element sodium. It is a soft, silvery-white, highly reactive alkali metal.
   • A specific identifier: In the periodic table, the atomic number uniquely identifies an element by the number of protons in its nucleus. "Atomic number 11" means the atom contains 11 protons.

Examples of Usage

• Noun:
  • The symbol for atomic number 11 is Na.
  • Atomic number 11 is essential for nerve function in biological organisms.
  • When handling pure atomic number 11, caution is required due to its violent reaction with water.

Advanced Usage

• In scientific contexts: The term is used for precise classification, especially in chemistry, physics, and materials science.
  • The isotope of atomic number 11 used in medical imaging is sodium-24.

Variants and Related Words

• Sodium (Na): The common name for the element with atomic number 11.
  • Table salt is sodium chloride, a compound of sodium (atomic number 11) and chlorine.
• Natrium: The Latin-derived name from which the symbol 'Na' originates.

Synonyms

• Sodium: The standard name for the element.
• Na: The chemical symbol.

Related Phrases

• Alkali metal: The group in the periodic table to which atomic number 11 belongs.
• Reactive metal: A descriptive phrase highlighting a key chemical property of atomic number 11.

Học thuật

Noun

1. a silvery soft waxy metallic element of the alkali metal group; occurs abundantly in natural compounds (especially in salt water); burns with a yellow flame and reacts violently in water; occurs in sea water and in the mineral halite (rock salt)

Từ đồng nghĩa

• sodium
• Na