Answer:
Non-metal: A non-metal is an element that lacks metallic properties. They are typically poor conductors of heat and electricity, brittle when solid, and have low melting and boiling points compared to metals.
Non-metal oxide: A non-metal oxide is a compound formed when a non-metal element reacts with oxygen. These compounds can be acidic or neutral and often react with water to form acids or bases. Examples include carbon dioxide (CO2), sulfur dioxide (SO2), and nitrogen dioxide (NO2).