Any substance that appeaers in the Periodic Table. is an element.
e.g. Iron (Fe)
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Calcium is an example of a pure substance known as an element, specifically a metal. Carbon is also a pure substance, but it is an element that belongs to the non-metal group.
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.
When all atoms in a substance are alike, the substance is an element. Each element is composed of atoms that have the same number of protons in their nucleus.
An example of an element is oxygen, which is a chemical substance consisting of atoms with the same number of protons in their nucleus. It is the third most abundant element in the universe and plays a crucial role in sustaining life on Earth.
It is known as an element. An element is a substance that is made up of only one type of atom, characterized by a unique atomic number on the periodic table.