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Krys Chem 1
Exam 1
Question | Answer |
---|---|
Metalloids | elements that touch bold line except Al |
Heterogeneous | Components not mixed uniformly; can see individual components |
Density | amount of substance per unit volume; ususally g/mL |
Density Equations | D= M/V, M= DxV, or V= M/D |
Physical Change | doesn't change chemical nature |
Rows (periods) | runs left to right on periodic table |
suspension | opaque (cant see thru them) particles are large enough to be seen |
Sublimation | solid straight to gas |
Alkaline earth metals | Column 2 |
Endothermic | takes in heat (remember En) |
states of matter | solid, liquid, gas |
Deposition | gas straight to solid |
Melting | solid to liquid |
Boiling Point | 212 F and 100 C |
Exothermic | gives off heat (remember ex) |
Room Temp | 68 F and 20 C |
Freezing Point | 32 F and 0 C |
Chemical Change | does change its chemical nature |
Evaporation | liquid to gas |
Nonmetals | to the right of bold line |
Transition Metals | Columns 3-10 (smaller area on table) |
Columns (Groups) | Run up and down |
Condensation | gas to liquid |
Freezing | liquid to solid |
Alkali metalse | Column 1 |
Kinetic Energy | energy results from motion |
Halogens | column 15 |
Scientific Method | observation, hypothesis, experimental test, conclusion, report results |
Giga (G) | 1,000,000,000 |
Kilo (k) | 1,000 |
Centi (c) | 0.01 |
Milli (m) | 0.001 |
Micro | 0.000001 |
element | substance that can't be broken down into simplier substances |
F and C degrees line up | -40 |
Compound | substance that can be broken down into simplier substances by chemical means |
mixture | substance that can be broken down by physical means |
homogeneous | all components are mixed uniformly; looks like 1 substance |
Noble gases | last column |
unit for mass | grams (g) |
unit for length | meters (m) |
unit for volume | Liters (L) |
Unit for time | seconds (s) |
Solution | Clear (doesn't mean colorless) |
Potential Energy | stored energy |
metals | to the left of bold line |