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Chemistry 10-25-12
| Atomic Theory | 1. All Things are made of matter 2. Same element=same mass 3. Compounds=combination of more than one element 4. Different elements combine in same way |
| How many electrons are in each level? | 1st - 2 2nd - 8 3rd - 8 4th - + |
| Luster? | Shininess |
| Ductility | ability to be streched into wire |
| Elasticity | ability to be streched |
| Malleability | ability to bend without breaking |
| Conductivity | ability to conduct heat |
| electronegativity | ability to attract electrons |
| melting point | temp. at which an element melts |
| freezing point | temp. at which an element freezes |
| boiling point | temp. at which an element boils |
| said all matter consistes of particles that can't be seperated | Democritus |
| said different types of atoms have different properties | Democritus |
| said all substances are made of earth, wind, water, or fire | Aristotle |
| said atoms are solid sphere | Dalton |
| developed atomic theory | Dalton |
| made "billiard ball model" of atom | Dalton |
| said atom is solid sphere with electrons stuck to it | Thomson |
| preformed Cathode Ray Tube to discover electrons | Thomson |
| made "Plum Pudding Model" of atom | Thomson |
| discovered positive nucleus (protons) | Rutherford |
| said electrons move randomly around nucleus | Rutherford |
| made "Planetary Model" of model | Rutherford |
| preformed Gold Foil Expirement to discover positive nucleus (protons) | Rutherford |
| said electrons in energy levels around nucleus | Bohr |
| said energy levels at fixed distance around nucleus | Bohr |
| said electrons have own pathway | Bohr |
| made "Bohr Model" of atom | Bohr |
| ran flame tests to discover electron energy levels | Bohr |
| developed mathematical equations to describe motion of electrons | Schrodinger |
| made "Electron Cloud Model - Probablity Model" of atom | Schrodinger |
| confirmed existance of neutrons and it's properties | Chadwick |
| studied how elements combine to establish the atomic theory | Dalton |
| valence electrons | electrons in outer shell of atom |
| groups most likely to bond | Alkali Metals, Alkaline Earth Metals, Halogens |
| groups least likely to bond | Boron Family, Carbon Family, Nitrogen Family, Oxygen Family, Nobel Gases |
| Lewis Dot Structure | Symbol in middle ; valence electrons as dots surrounding symbol |
| Bohr Model | nucleus surrounded by electron energy levels |
| Electron Cloud Model | nucleus in center with protons and neutrons ; electrons surround nucleus in cloud |
| Density | m/v |
| how do you find volume? | meter stick, water displacement, graduated cylinder |
| how do you find mass? | scale |
| ion | atom that has lost or gained electrons |
| cation | positive ion - more protons |
| anion | negative ion - more electrons |
| isotope | atom that lost or gained neutrons |
| subatomic particles | proton, electron, neutron |
| particle(s) in nucleus | protons, neutrons |
| negative particle in an atom | electron |
| positive particle in an atom | proton |
| neutral particle in an atom | neutron |
| which particle(s) make up the mass of an atom | proton, neutron |
| how do you find the number of protons in an atom? | protons = atomic # |
| how do you find the number of electrons in an atom? | protons = electrons, unless an ion |
| how do you find the number of neutrons in an atom? | neutrons = mass-protons |
| how do you know how many valence electrons an element has? | Bohr Model, Lewis Dot Structure, or group on periodic table |
| What group # is the Alkali Metals | Group 1 |
| What group # is the Alkaline Earth Metals | Group 2 |
| What group # is the Boron Family | Group 3 |
| What group # is the Carbon Family | Group 4 |
| What group # is the Nitrogen Family | Group 5 |
| What group # is the Oxygen Family | Group 6 |
| What group # is the Halogens | Group 7 |
| What group # is the Nobel Gases | Group 8 |
| The group # also equals... | the number of valence electrons the elements inside that group have |
Created by:
ermahgerd
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