An element.
An element is a substance that contains only one kind of atom. Examples include hydrogen, oxygen, and carbon. Each element is defined by the number of protons in its atomic nucleus.
An Element is the substance consisting of only one type of atom
An element is the correct answer
A substance that is made up of only one atom is called a pure substance. A pure substance is also called an element on the Periodic Table.
Elements are made up of only one kind of atoms. For example graphite and diamond are forms of the element carbon, and only contain carbon atoms.Atoms of a single element may combine as molecules, or structurally as allotropes, in a number of ways.
element
A compound
An element is a substance that contains only one kind of atom. Examples include hydrogen, oxygen, and carbon. Each element is defined by the number of protons in its atomic nucleus.
A substance made up of only one kind of atom is an element.
Aluminum contains only one kind of atom.
A substance made up of only one kind of atom is an element, which is a pure substance.
An element is a substance that contains only one kind of atom, characterized by a specific number of protons in its nucleus. Each element has unique chemical properties based on the number of protons in its atoms.
An Element is the substance consisting of only one type of atom
They are elements.
An element.
An element is the correct answer
an element