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Chem Midterm
| Question | Answer |
|---|---|
| formula for finding energy | E=hv |
| h= ??? | 6.63x10^-34 J/s |
| Formula for finding wavelength | C=v/\ |
| C= ??? | 3.00x10^8 m/s |
| covalent bond | sharing of electrons between a nonmetal and a nonmetal |
| ionic bond | gain and loss of electrons between a metal and a nonmetal |
| metallic | strong bond between a metal and a metal |
| group 1= | Alkali metals |
| group 2= | alkaline earth metals |
| group 17= | halogens |
| group 18= | noble gases |
| periodic trends for atomic radius | <---- increasing and down |
| periodic trends for ie, en, and ea | ^ and ----> increasing |
| time si base unit | second |
| length si base unit | meter |
| mass si base unit | kilogram |
| temperature si base unit | kelvin |
| amount of a substance si base unit | mole |
| giga | (G) 1x10^9 m |
| mega | (M) 1x10^6 m |
| kilo | (k) 1x10^3 m |
| centi | (c) 1x10^-2 m |
| mili | (m) 1x10^-3 m |
| micro | (ua) 1x10^-6 m |
| nano | (n) 1x10^-9 m |
| accuracy | how close a measurement is to some accepted or true value % error |
| precision | reliability, repeatability, consistency of a measurement + or - uncertainty and significant digits |
| element | simplest kind of mtter, all one kind of atom, can't be broken down |
| compound | substances that can be broken down chemically |
| mixture | physical blend of @least two substances |
| solid | definite volume and shape; particles packed in fixed positions |
| liquid | definite volume, indefinite shape; particles close together |
| gas | indefinite volume and shape; particles @ great distances from one another in constant random motion |
| plasma | high temperature, ionized phase of matter as found on the sun |
| phase changes that require energy | melting, evaporation, sublimation |
| phase changesthat release energy | condensation, freezing |
| Dalton | Atomic theory |
| Thomson | plum pudding model |
| Rutherford | Gold Foil Experiment, nucleus, nuclear model |
| Bohr | planetary model |
| schrodinger | mathematical; quantum mechanical model |
| chadwick | neutron |
| fission | splitting a nucleus into 2+ smaller nuclei; nuclear energy and weapons |
| fusion | combining of two nuclei to form one nucleus oflarger mass; H-bomb, sun |
| principal qn | n- denotes energy level in which the electron is located; indicates distance from nucleus- n increases, distance increases |
| angular momentum qn | l- sublevel |
| magenetic qn | ml- orientation of electron's orbital; between -1 and 1; max # orbitals for each energy level is n^2 |
| spin qn | ms- direction of spin of an electron within a magnetic field; each orbital can contain 2 electrons; 1 cw 1 ccw |
Created by:
AlanaR
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