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Phys and chem change
vocab.
Question | Answer |
---|---|
A change that occurs without changing the identity of of the substance | Physical change |
A change that occurs when you change the identity if a substance | Chemical change |
When two or more substances are combined physically | Mixture |
When two or more substances are combined chemically and can't be separated by physical means | Compound |
Parts are mixed evenly throughout | Homogeneous Mixture |
Parts are uneven throughout | 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 smoething | mass |
The elements you start with in a reaction | reactant |
The elements you end with in a reaction | Product |
The ability to react with another element or compound | Reactivity |
The number in front of the molecule | Coefficient |
The number at the bottom right that tells how many atoms are in the element | Subscript |
Group 1 a highly reactive group of metals that makes compounds with Group 7 | 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 |