Define the term of iron atom and molecules elements
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iron - a strong, hard magnetic silvery-grey metal, the chemical element of atomic number 26, much used as a material for construction and manufacturing, especially in the form of steel.
atom-the smallest particle of a chemical element that can exist.
molecules-a group of atoms bonded together, representing the smallest fundamental unit of a chemical compound that can take part in a chemical reaction.
elements-an essential or characteristic part of something abstract.
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