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Phys. Chem changes
Physical and chemical changes
Question | Answer |
---|---|
a change that occurs without changing the identity of a substance | Physical change |
a change that occurs by changing the identity of a substance | chemical change |
when 2 or more substance are combined physically | mixture |
when 2 or more substance are combined chemically and can;t be separated by physical means | compound |
Parts that are mixed evenly | Homogenous Mixture |
Parts that are mixed unevenly | Heterogenous Mixture |
type of mixture where the solution dissolves/ mixed evenly in the solvent | Solution |
part of the solution that dissolves | solute |
Part of the solution that the solvent dissolves in | solvent |
smallest unit of matter | Atom |
one of the 100 more substances are combined chemically and can;t be separated by physical means | 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 that element | Subscript |
Group 1 a highly reactive group of metals that makes compound with group 7 (17) | Alkali Metals |
Groups 7 (17) a highly reactive group of non- metals that makes compounds with group 1 | Halogens |
Group 8 (18) a group of non- metals that are all gases at room temperature | Noble gases |