Answer:
Elements: Hydrogen, Helium, Oxygen, Neon, Nitrogen
Mixtures: Smog, Mud, Cement, Gunpowder, Gasoline
Compounds: Water, Glucose, Carbon monoxide, Carbon dioxide, Methane
Step-by-step explanation:
Element: any substance that cannot be separated into different substances by ordinary chemical methods.
Mixture: a material made up of two or more different chemical substances which are not chemically bonded.
Compounds: a distinct substance formed by chemical union of two or more ingredients in definite proportion by weight a new antibiotic compound.