click below
click below
Normal Size Small Size show me how
Vocab Homework
Question | Answer |
---|---|
Pure Substance | Substance made of one kind of materials having definite properties. (Element or Compounds) |
Element | Pure substance made up of only one type of atom. Anything that can be found on the periodic table |
Compound | Pure substance made up of two or more elements which have been chemically joined. EX: Water, Salt, Sugar, Carbon Dioxide |
Molecule | Smallest unit of a compound water Molecule |
Chemical Formula | Combination of chemical symbols used to represent a compound (H2o, NaCl, H202) |
Chemical Equation | Expression using symbols, formulas and numbers are used to represent a compound. 4H + O2 → 2H2O |
Coefficient | Number in front of a chemical formula or symbol that tells you how many molecules are involved in the reaction. |
Subscript | Shows the number of atoms of an element in a molecule. |
Reactant | Materials present before a reaction |
Product | Materials present after a reaction. |