chemical element

Thân thiện

A student studies the chemical element copper on the periodic table.

Definition

1. Noun:
   • A chemical element is a pure substance consisting of only one type of atom, distinguished by its atomic number (the number of protons in its nucleus). It is a fundamental form of matter that cannot be broken down into simpler substances by ordinary chemical means.

Usage

• The term chemical element is used to refer to the basic building blocks of all physical matter in the universe.
• It is often used in scientific contexts, such as chemistry, physics, and geology, to classify and discuss the properties of pure substances.
• The phrase "the chemical element" can be used when referring to a specific element (e.g., "the chemical element oxygen").

Examples

• Noun:
  • Hydrogen is the simplest chemical element.
  • The periodic table organizes all known chemical elements.
  • Gold is a chemical element with the symbol Au.
  • Scientists are trying to synthesize new chemical elements in the laboratory.

Advanced Usage

• "To be composed of a chemical element": Describes a substance made purely of one type of atom.
  • A diamond is composed solely of the chemical element carbon.
• "Naturally occurring chemical element": Refers to an element found in nature, as opposed to those synthesized artificially.
  • Uranium is a naturally occurring chemical element.

Variants and Related Words

• Element (n): The more common, shortened form of "chemical element." In scientific contexts, it is perfectly synonymous.
  • Oxygen is an essential element for life.
• Elemental (adj): Relating to or resembling an element; basic or fundamental.
  • The wizard commanded the elemental forces of fire and water.

Synonyms

• Atomic species: A more technical term emphasizing the atomic nature of the substance.
• Simple substance: An older term highlighting that it cannot be decomposed by chemical reactions.

Related Phrases

• Trace element: A chemical element required in minute amounts for the healthy growth of an organism.
  • Zinc is an important trace element in the human diet.
• Transition element: Any of the metallic elements occupying the central block of the periodic table.
  • Iron is a well-known transition element.

Học thuật

Noun

1. any of the more than 100 known substances (of which 92 occur naturally) that cannot be separated into simpler substances and that singly or in combination constitute all matter

Từ đồng nghĩa

• element