chromium

/'kroumjəm/

Thân thiện

Chromium plating gives the car bumper a shiny silver finish.

Definition

1. Noun:
   • A chemical element: Chromium is a hard, brittle, multivalent metallic element with the symbol Cr and atomic number 24. It is known for its high resistance to corrosion and tarnishing, often used in alloys like stainless steel and for electroplating.

Usage Examples

• Noun:
  • Stainless steel contains a significant amount of chromium.
  • The shiny bumper was coated with a thin layer of chromium to prevent rust.

Advanced Usage

• "Hexavalent chromium": A specific, toxic form of chromium with a +6 oxidation state, often discussed in environmental and occupational health contexts.
  • The factory was cited for improper disposal of hexavalent chromium.

Variants and Related Words

• Chrome (n): A common informal term for chromium, especially when referring to its use in plating or as a pigment (e.g., chrome plating).
  • He restored the vintage car's chrome bumpers.
• Chromic (adj): Relating to chromium, especially in compounds where chromium has a higher valence.
  • Chromic acid is used in certain industrial processes.

Synonyms

• Element 24: Referring to its atomic number.
• Cr: Its chemical symbol.

Related Phrases and Compounds

• Chromium plating: The process of electroplating a thin layer of chromium onto a metal object for decoration and protection.
  • Chromium plating gives the faucet its mirror-like finish.
• Chromium steel: Another term for stainless steel, highlighting chromium's role in the alloy.
  • The knife is made from high-quality chromium steel.

Học thuật

Noun

1. a hard brittle multivalent metallic element; resistant to corrosion and tarnishing

Từ đồng nghĩa

• Cr
• atomic number 24