Question | Answer |
Physical Change | A change that occurs without changing the identity of the substance |
Chemical Change | A change that occurs by changing the identity of the substance |
Mixture | When 2 or more substance are combined physically |
Compound | When 2 or more substances are combined chemically and can't be separated by physical means. |
Homogeneous Mixture | Parts are mixed evenly throughout (same) |
Heterogeneous Mixture | Parts are uneven throughout (different) |
Solution | Type of mixture where the solute is dissolved/mixed evenly in the solvent |
Solute | The part of the solution that dissolves |
Solvent | The part of the solution that the solute dissolves in |
Atom | Smallest unit of matter |
Element | One of the 100 or more units that make up all matter, and found on the Periodic Table. |
Mass | How much matter is in something |
Reactant | The elements and compounds you start with in a reaction/equation |
Product | The elements and compounds that you end with in a reaction/equation |
Reactivity | The ability to react with another element or compound |
Coefficient | The number in the front of the molecule |
Subscript | The number to the bottom right of an element that tells how many atoms there are of that element |
Alkali Metals | Group 1 a highly reactive group of metals that makes compounds with Group 7 (17) |
Halogens | Group 7 (17) a highly reactive group of non-metals that makes a compound with Group 1 |
Noble Gases | Group 8 (18) a group of non-reactive, non-metals that are all gases at room temperature |