Question

sugar is composed of oxygen, hydrogen and carbon. which type of substance is sugar?
a an element
b an atom
c a molecule
d a compound

Explanation:

• An element is a pure substance made of only one type of atom. Sugar has three types of atoms (oxygen, hydrogen, carbon), so it's not an element.
• An atom is the smallest unit of an element. Sugar is made of multiple atoms, so it's not an atom.
• A molecule is a group of atoms bonded together. While sugar is made of molecules, the more specific term considering its composition of different elements is compound.
• A compound is a substance formed when two or more different elements are chemically bonded together. Sugar (with oxygen, hydrogen, carbon) fits this definition.

Answer:

d. a compound