3. Atoms An atom a fundamental piece of matter made up of protons, neutrons and electrons. Electrons Protons Neutrons
4. Metals Metal is an element, compound, or alloy characterized by electrical and heat conductivity .
5. What is non-metal? A non-metal is an element on the periodic table that does not have the properties of a metal element such as malleability. Non metals are usually found as gases in nature or weak, brittle solids.
7. What is a compound? A chemical compound is a substance composed of two or more different elements chemically bonded together in a fixed proportion by mass.
8. Chemicsal Reaction A chemical reaction is a process that leads to the transformation of one set of chemicals substances to another.
10. Physical and Chemical changes. A chemical change is non reversible as a physical change is. For example, the burning of wood is a chemical change, as you can't unburn it, whereas the freezing of water would be a physical change because it can be reversed.
11. Factors affecting a Reaction Rate. Temperature, concentration, size of particles or using a catalyst. Add a picture.