Take the element "Iron" then the symbol for the element is "Fe" and "Fe" is also the symbol for a single atom of the element in a chemical equation.
A single atom of an element is represented by that element's chemical symbol.
The chemical symbol is used only for chemical elements; the chemical formula is for molecules. Ex.: Na is the chemical symbol of sodium and NaCl is the chemical formula of sodium chloride.
compounds
atom or element
Well I'm not sure if I understand your question but it's divided up like this Molecule, then Atom then, neutrons electrons and protons. ---------------------------------------------------------------------------------- The smallest unit of any element is an atom of that element. The smallest unit of any compound is a molecule of that compound (molecules are made of atoms)
A single atom of an element is represented by that element's chemical symbol.
"Na" is the symbol of an atom of the element sodium.
The chemical symbol is used only for chemical elements; the chemical formula is for molecules. Ex.: Na is the chemical symbol of sodium and NaCl is the chemical formula of sodium chloride.
They are elements not compound mixture
A chemical symbol represents a single atom of an element, but a formula represents a chemical entity with constant composition that contains at least two atoms.A chemical symbol represents a single atom of a chemical element, but a chemical formula represents the types and numbers of atoms in a chemical entity larger than a single atom. The entity is called a molecule if the compound is covalently bonded and a formula unit if the entity is ionically bonded.
A chemical symbol represents a single atom of an element, but a formula represents a chemical entity with constant composition that contains at least two atoms.A chemical symbol represents a single atom of a chemical element, but a chemical formula represents the types and numbers of atoms in a chemical entity larger than a single atom. The entity is called a molecule if the compound is covalently bonded and a formula unit if the entity is ionically bonded.
A chemical symbol represents a single atom of an element, but a formula represents a chemical entity with constant composition that contains at least two atoms.A chemical symbol represents a single atom of a chemical element, but a chemical formula represents the types and numbers of atoms in a chemical entity larger than a single atom. The entity is called a molecule if the compound is covalently bonded and a formula unit if the entity is ionically bonded.
A chemical symbol represents a single atom of an element, but a formula represents a chemical entity with constant composition that contains at least two atoms.A chemical symbol represents a single atom of a chemical element, but a chemical formula represents the types and numbers of atoms in a chemical entity larger than a single atom. The entity is called a molecule if the compound is covalently bonded and a formula unit if the entity is ionically bonded.
H, for the element hydrogen.
compounds
Mercury is an element, which means the smallest unit is a single atom.
Elements are not species. Helium is an element. Helium can be a single atom.