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CHE-125 Ch. 3
| Question | Answer |
|---|---|
| Dalton's Atomic Theorey 1-3 | 1. all matter is made up of atoms 2. atoms of the same element are alike and are different from other elements 3. Chemical compounds are made up of spefic combinations of atoms. |
| Dalton's Atomic Theorey 4-5 | 4 atoms of different alements can combine in various raitons to make diff. compunds 5. Chemical reacitons change the way atoms are combined not he atoms themselves. |
| Atoms are divided into 3 parts: | from small->larger: Electrons (-1), and Neutrons (0), Protons (+1). |
| Atom Composition | Nuclues contains P's and N's and contains most of the mass. Nuclues surrounded by electron cloud. Nucleus: Marble, Elec. Coud: football stadium. Density of nucleus= Large M/Small V |
| The Gold Foil Expieriment | done by Rutherford, using alpha particle source, detector material and gold foil. When alpha particles go through electron cloud the pass through, when the hit nucleus they bounce back. |
| Atomic Number | (Z) = number of protons / electrons |
| Atomis Mass | (A) = number of protons + nuetrons |
| Isotopes | Same elements but diff. # of nuetrons. |
| AMU -> Grams conversion | 1amu=1.6606 * 10^(-24)g |
| Main Group | 1,2,13-18 |
| Transition Metal | 3-12 |
| Alkali Metals | 1A(Except H): Soft,react very vigourously w?water, lustrous, onlt found in nature in compunds. |
| Alkaline Earth Metals | 2A similar to 1A but less extreme |
| Halogens | 7A: Colorful, corrosive, reactive, found only as compunds in nature, usually with Alk. metals. |
| Noble Gases | 8A: all elements are gases, don't react, never found as compunds. |
| Periodic Table History | Mendeleev: father of P.T., 1st published in 1869, ordered by mass number (at the time). |
| Electorn Config. Energy Levels | N=energy level. As n increases electrons are further away from nuclues and energy increases. |
| Shell #'s | 4 |
| Sublevels | 1(S)....2(S,P)....3(S,P,D)....4(S,P,D,F). |
| Orbitals for each subshell? | S(1)...P(3)...D(5)....F(7) |
| # of electrons held by each SUBSHELL? | S(2)....P(6)....D(10)....F(14) |
| HOw many electrons can 1 orbital hold? | 2 |
| How to determine how many valence electrons through P.T.? | Roman Numerals |
| How to determine the valence shell through P.T. | Period Number |
| How to abrev. electron configuration? | Take element, up one row, and to the right to the the noble gas. |
| S Block | 1A & 2A |
| D Block | Transition elements |
| P Block | 3A-8A |
| F Block | 2 bottom rows |
Created by:
kaelin.steele
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