sodium

/'soudjəm/

Thân thiện

A scientist carefully adds a small piece of sodium to a beaker of water.

Definition

1. Noun:
   • A chemical element: Sodium is a soft, silvery-white, highly reactive metallic element that belongs to the alkali metal group. It is represented by the symbol Na (from Latin natrium) and has the atomic number 11.
   • A common element in nature: Sodium occurs abundantly in natural compounds, especially in salt water (like seawater) and minerals such as halite (rock salt). It is an essential element for many biological processes.

Examples of Usage

• Noun:
  • Table salt is chemically known as sodium chloride.
  • Sodium reacts violently with water, producing hydrogen gas and heat.
  • The doctor advised reducing sodium intake to manage blood pressure.

Advanced Usage

• "Sodium vapor": Refers to sodium in a gaseous state, often used in certain types of street lamps which emit a characteristic yellow light.

  • Sodium vapor lamps are efficient for street lighting.

• "Sodium ion" (Na⁺): The form in which sodium commonly exists in biological systems and solutions, crucial for nerve function and fluid balance.

  • Sodium ions are key to generating nerve impulses.

Variants and Related Words

• Sodium chloride (n): The chemical compound for common table salt (NaCl).
• Sodium bicarbonate (n): A chemical compound (NaHCO₃), also known as baking soda.
• Sodium hydroxide (n): A strong alkali (NaOH), also known as lye or caustic soda.

Synonyms

• Na: The chemical symbol for sodium.
• Natrium: The Latin name from which the symbol Na is derived.

Related Phrases

(Note: As a specific chemical element, 'sodium' itself does not commonly form phrasal verbs. The related phrases are typically compound nouns as listed above.)

Related Idioms

(Note: There are no common idioms that feature the word 'sodium' as the key term. Its usage is primarily scientific and technical.)

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

• Na
• atomic number 11