Chemical reactants

Define reactants in a chemical reaction

substances reacting at the start of a reaction

Define products in a chemical reaction

substances produced at the end of a reaction

What is the difference between a chemical and physical change

Physical changes are changes in the appearance or form of a substance, whereas chemical changes are rearrangements of atoms to form something new.

What are some examples of chemical changes

Burning wood, an iron nail rusting, digesting food

What are some examples of physical changes

Ice cream melting, cutting fruit, boiling water

What are indicators that a chemical change has occurred

Sound produced, change in colour, gas produced, light produced, change in temperature, solid produced

What is the law of conservation of mass

Law of conservation of mass states that matter can be neither created nor destroyed

What is an ore

reactive metals found naturally as compounds

What is a native metal

non-reactive metals found naturally in their elemental form

Identify and explain metal extraction methods

Reaction with carbon - reacting metal oxides with carbon removes oxygen from the metal ore

What is green chemistry

Green chemistry is the design of chemical products and processes that eliminate the use or production of hazardous substances

How many green chemistry principles are there

12