Answer: gold
Explanation:
Element is a pure substance which is composed of atoms of similar elements. Example: Argon with atomic symbol [tex]Ar[/tex]
Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass.
Example: Water with formula [tex]H_2O[/tex] and contains hydrogen and oxygen in a fixed ratio by mass
1. Sugar has chemical formula of [texC_{12}H_{22}O_{11}[/tex] and thus is a compound.
2. Water has chemical formula of [tex]H_{2}O[/tex] and thus is a compound.
3. Silicon dioxide has chemical formula of [tex]SiO_2[/tex] and thus is a compound.
4. Gold has chemical formula of [tex]Au[/tex] and thus is an element.
