Element
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Example:
Imagine you have a jigsaw puzzle where every piece is exactly the same, making it impossible to break down into more basic parts. This is similar to an element, which is a substance made of one type of atom that cannot be broken down chemically into simpler substances. Just like the puzzle pieces that are all identical and form a complete image on their own, an element consists entirely of one kind of atom, which defines its unique properties and cannot be reduced further.

Practice Version

Element: A substance made of one type of atom that cannot be broken down chemically. Element. An element is a pure substance consisting of only one kind of atom.