Chemical element
Chemical Element
A Chemical Element (pronunciation: /ˈkɛmɪkəl ˈɛlɪmənt/) is a species of atoms having the same number of protons in their atomic nuclei. The term originates from the Greek word "stoicheion" (meaning "element") and the Latin word "elementum" (meaning "principle" or "rudiment").
Description
There are 118 confirmed chemical elements, from Hydrogen (the lightest element) to Oganesson (the heaviest). Each chemical element has a unique atomic number representing the number of protons in its nucleus. Chemical elements can combine to form chemical compounds.
Classification
Chemical elements can be classified into several categories based on their properties:
- Metals: These are elements that are good conductors of heat and electricity.
- Nonmetals: These are elements that are poor conductors of heat and electricity.
- Metalloids: These are elements that have properties in between metals and nonmetals.
Properties
Each chemical element has specific properties including atomic number, atomic weight, and electron configuration. These properties determine the chemical element's behavior in chemical reactions.
See Also
References
External links
- Medical encyclopedia article on Chemical element
- Wikipedia's article - Chemical element
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