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an element is a substance rested with only one and ONE substance
hydrogen
Something that is only one type of atom is an element. There is no name applying to both atom and compound, other than "a pure substance".
No. An element is a pure substance made of only one kind of atom. A compound is a pure substance made of two or more kinds of atom.
Element.
A substance made up of only one kind of atom is an element, which is a pure substance.
Element
an element or a molecule
This is an isotope of a chemical element.
an element is a substance rested with only one and ONE substance
Elements only contain one kind of atom.
element
element!
Element
atom
hydrogen
An element is made up of one kind of atoms