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Midterm
| Question | Answer |
|---|---|
| how many significant figures? 1) 0.00002453mm 2) 1100ft 3)2.334x10^5 | 1) 4 2) 2 3) 4 |
| q | energy |
| m | mass |
| TriangleT | change in temp. |
| Endothermic | Process absorbs energy |
| Heat is always transferred from _____ objects to _____ cooler objects. | warmer cooler |
| Scientific Notation 123 000 000 | 123 x 10^6 |
| H2 N2 O2 examples of what? | Diatomic Elements |
| OJ with pulp in oil and water is example of what kind of mixture? | Heterogeneous |
| The _______ _________ is a factor that's intentionally varied by the experimenter. | independant variable |
| 6 classifications of matter | solid liquid gas compound mixture element |
| A ____ has a fixed volume and shape that result from the way their particles are arranged. | Solid |
| Basic SI unit for amount of substance. | Mole |
| _____ are pure substances that are only made up of one type of atom. | Element |
| 2 types of pure substance | element and compound |
| Chemical compounds always contains the same element in exactly the same proportions by weight and mass? | law of DP |
| Law that states the closer 2 charges are the greater the force. | Coulomb's |
| Who created law of octaves? | John Newlands |
| How did Medeleev organize elements | increasing atomic mass |
| How did Moseley organize elements | increasing atomic # |
| define periodic law | states how elements are arranged according to their atomic # |
| which family has the most stable elements. why? | noble gas because they have full set of valence electrons. |
| elements are mainly what? | metals |
| what are the properties of metals? | good conductor of heat and electricity ductile malleable chemical properties shiny |
| list the 11 families | hydrogen alkali/earth metals transition boron carbon nitrogen oxygen halogen noble rare earth |
Created by:
tanishawilliams
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