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Definition

Cobalt, a metallic chemical element with atomic number 27 and symbol Co.

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How it's used

Technical terms for chemical elements are almost exclusively used in academic or professional scientific contexts in Hong Kong. Outside of chemistry classrooms or industrial manufacturing, you will rarely hear this word spoken in daily life. It is treated as a standard noun and follows the same grammatical rules as other metallic elements.

Common phrases

Grammar color guide

Noun
Verb
Adjective
Adverb
Pronoun
Classifier
Particle
Connector