Elements are substances (like hydrogen and oxygen) that can't be split into simpler substances. A substance like water, that is made up of two or more elements, is called a compound.
A chemical element is a pure substance that consists of one type of atom. Each atom has an atomic number, which represents the number of protons that are in the nucleus of a single atom of that element.
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Answer:
Elements are substances (like hydrogen and oxygen) that can't be split into simpler substances. A substance like water, that is made up of two or more elements, is called a compound.
A chemical element is a pure substance that consists of one type of atom. Each atom has an atomic number, which represents the number of protons that are in the nucleus of a single atom of that element.