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Gen. Chemistry Ch. 1
| Question | Answer |
|---|---|
| element 1- H | hydrogen |
| element 2- He | helium |
| element 3- Li | lithium |
| element 4- Be | beryllium |
| element 5- B | boron |
| element 6- C | carbon |
| element 7- N | nitrogen |
| element 8- O | oxygen |
| element 9- F | fluorine |
| element 10- Ne | neon |
| element 11- Na | sodium |
| element 12- Mg | magnesium |
| element 13- Al | aluminum |
| element 14- Si | silicon |
| element 15- P | phosphorus |
| element 16- S | sulfur |
| element 17- Cl | chlorine |
| element 18- Ar | argon |
| element 19- K | potassium |
| element 20- Ca | calcium |
| element 21- Sc | scandium |
| element 22- Ti | titanium |
| element 23- V | vanadium |
| element 24- Cr | chromium |
| element 25- Mn | manganese |
| element 26- Fe | iron |
| element 27- Co | cobalt |
| element 28- Ni | nickel |
| element 29- Cu | copper |
| element 30- Zn | zinc |
| element 31- Ga | gallium |
| element 32- Ge | germanium |
| element 33- As | arsenic |
| element 34- Se | selenium |
| element 35- Br | bromine |
| element 36- Kr | krypton |
| element 47- Ag | silver |
| element 50- Sn | tin |
| element 53- I | iodine |
| element 78- Pt | platinum |
| element 79- Au | gold |
| element 80- Hg | mercury |
| element 82- Pb | lead |
| scientific method | observation > question > hypothesis > experiment |
| solids | occupy constant space, volume, and shape independent of container, rigid, close together |
| liquids | occupy constant space, definite volume, independent shape: shape of container |
| gases | diffuse, no fixed volume or shape, conforms to shape of container, compressible, constantly moving |
| kilo- (k) | 1 x 10^3 |
| deci- (d) | 1 x 10^-1 |
| centi- (c) | 1 x10^-2 |
| milli- (m) | 1 x10^-3 |
| micro- (upside down h) | 1 x10^-6 |
| nano- (n) | 1 x10^-9 |
| angstrom (A w/ halo) | 1 x10^-10 |
| Kelvin (K) equals | C + 273.15 |
| Fahrenheit equals | (9/5)C + 32 |
| Celsius equals | 5/9 (F- 32) |
| density equals | mass/volume |
| volume equals | mass/ density |
| mass equals | density(volume) |
| multiply and divide (w/ sig figs) | report to the least number of sig figs |
| add and subtract (w/ sig figs) | report to the least number of decimal placements |
| zeros between nonzero numbers (captive) | significant |
| zeros following a decimal point (trailing) | significant |
| zeros before the first nonzero digit (placeholders) | not significant |
| sig figs of 7.350 | four |
| sig figs of 7350 | three |
| sig figs of 7350. | four |
| sig figs of 0.015 | two |
| (1815 - 1805)(9.11 x 7.92) w/ sig figs | (9)(72.1512) = 649.3608 = 600 |
| 20.4g - 1.322g (w/ sig figs) | 19.1g |
| 2.00 in^3 >> ? cm^3 | 1 in = 2.54 cm 2.00 in^3 (2.54 cm/ 1.00 in)^3 = 32.8 cm^3 |
| 121 nm >> ? mm | 121 nm (1 x 10^-9/ 1nm)(1mm/ 1 x10^-3) = 121 x 10^-6 = 1.21 x 10^-4 mm |
| law of constant (definite) proportions | pure compound has the same composition and properties regardless of its source |
| physical properties | measured w/o changing the substance ex: color, density, odor, melting point |
| chemical properties | describe how substances react or change to form different substances ex: flamability |
| intensive properties | properties that do not depend on the amount of substance present ex: temperature, density, melting point |
| extensive properties | properties dependent on the quantity of substance present ex: mass, volume |
| physical changes | substance changes physical appearance w/o altering its identity (phase change) |
| chemical changes | substance transforms into something that is chemically different (rearrangement of bonds, new materials are formed) |
Created by:
jadamarsh
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