Term
| John Dalton (What Model?) |
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Definition
| Billiard Ball model, Small balls (similar to billiard balls) |
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Term
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Definition
All matter is composed of tiny particles called atoms which cannot be subdivided
The atoms of an element have identical properties while the atoms of different elements have other properties.
Atoms combine in small whole number ratios to form chemical compounds
Reactions involve reorganization of atoms; the atoms do not change. |
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Term
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Definition
Law of Conservation of mass
Law of Definite Proportions
Law of Multiple Proportions |
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Definition
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Term
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Definition
| JJ Thomson, shot a beam of electrons through a tube. A positive charge was on one side, and a negative charge was on the other. The ray leaned towards the positive side. Thomson found out that atoms need to have a positive and negative charge |
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Term
| Robert Millikan (expirement) |
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Definition
| used oil drop experiment to determine electron's charge was -1 |
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Definition
| Ernest Rutherford, shot small particles through gold foil. He thought they would just pass through, but some bounced back, or bounced at an angle. |
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Term
| Ernest Rutherford (model) |
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Definition
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Term
| Amadeo Avogadro (number and hypothesis) |
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Definition
| number of particles in 1 mole, 6.02 X 10^23 |
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Term
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Definition
| Proposed matter is indivisible ("atomis") |
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Term
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Definition
| Calculated mass of an electron |
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Term
| Discovered nucleus of the atom |
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Definition
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Term
| Three subatomic particles, location, charge, and mass |
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Definition
Protons: +1, nucleus, 1u
Neutrons: 0, nucleus, 1u
Electrons: -1, energy levels, 0u |
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Term
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Definition
| Isotopes- same atomic number, different mass number (same proton, different neutrons) |
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Term
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Definition
| on- charged atom (same protons, different electrons) |
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Term
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Definition
| Mass number- protons and neutrons |
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Term
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Definition
| Average atomic mass- weighted average of all isotopes of an element, on periodic table |
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Term
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Definition
Law of Conservation of Mass
Law of Definite Proportions
Law of Multiple Proportions |
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Term
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Definition
Atomic Number = # of protons
Symbol = find atomic number
Mass Number = add protons and neutrons
# of eletrons = charge and protons |
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Term
| Formula to solve average mass |
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Definition
| (mass of a)(% of a) + (mass of b)(% of b) ect. |
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Term
| Mole & Avogadro's number/ Molar mass |
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Definition
Mole- 6.02 x 10(23)
Molar mass- mass of one mole of atoms |
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Term
| Determine molar mass for compounds |
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Definition
| (element 1)(# of element 1)+(element 2)(# of element 2) ect. |
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Term
| Converting from grams to atoms |
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Definition
Grams - mole (molar mass)
mole - fun (6.02 x 10^23)
fun - atoms (count number of particles) |
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