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Chemical element
01
any of the simple chemical substances that consist of atoms of only one type, such as gold, oxygen, carbon, etc.
Example
Helium is a noble gas chemical element with the atomic number 2.
Uranium is a radioactive chemical element used as fuel in nuclear reactors.
Iron is a common chemical element found in the Earth's crust and core.
Sodium is a highly reactive chemical element used in various industrial processes.
Hydrogen is the lightest chemical element and is found in many compounds.
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