Gardner Greene
09/04/2024 · Junior High School
20. What is an element?
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An element is a pure substance that cannot be broken down into simpler substances by chemical means. It is made up of atoms that all have the same number of protons in their nuclei, which defines the element's atomic number. Elements are the fundamental building blocks of matter and are listed in the periodic table. Each element has unique properties, such as atomic mass, reactivity, and state of matter (solid, liquid, or gas) at room temperature. Examples of elements include hydrogen (H), oxygen (O), carbon (C), and gold (Au).
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An element is a pure substance made of atoms with the same number of protons, forming the basic units of matter.
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