click below
click below
Normal Size Small Size show me how
Phys &Chem Changes
vocab.
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 |
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 |
solven | 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 some thing |
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 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 compounds with Group 1 |
Noble Gases | Group 8 (18) a group of non-reactive, non-metals that are all gases at room temperature. |