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Phys. & Che. Changes
Physical and Chemical changes
Question | Answer |
---|---|
a change that occurs without changing the identity of the substance | Physical change |
a change that occurs by changing the identity of the substance | Chemical Change |
when 2 or more substance are combined physically | mixture |
when 2 or more substances are combined chemically and can't be separated by physical means. | compound |
parts are mixed evenly throughout (same) | Homogeneous mixture |
parts are uneven throughout (different) | Heterogeneous mixture |
type of mixture where the solute is dissolved/mixed evenly in the solvent | Solution |
the part of the solution that dissolves | solute |
the part of the solution that the solute dissolves in | solvent |
smallest unit of matter | atom |
one of the 100 or more units that make up all matter, and found on the Periodic Table | element |
how much matter is in some thing | mass |
the elements and compounds you start with in a reaction/equation | reactant |
the elements and compounds that you end with in a reaction/equation | product |
the ability to react with another element or compound | reactivity |
the number in front of the molecule | coefficient |
the number to the bottom right of an element that tells how many atoms there are of that element | subscript |
Group 1 a highly reactive group of metals that makes compounds with Group 7 (17) | Alkali Metals |
Group 7 (17) a highly reactive group of non-metals that makes compounds with Group 1 | Halogens |
Group 8 (18) a group of non-reactive, non-metals that are all gases at room temperature. | Noble Gases |