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57 Cards in this Set
- Front
- Back
Significant Figures
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Digits that you record. Precision of data
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Mono
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1
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Di
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2
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Tri
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3
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Tetra
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4
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Penta
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5
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Hexa
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6
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Hepta
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7
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Octa
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8
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Nona
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9
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Deca
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10
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Rules of Making Measurements
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You can be as precise as your least accurate measurement
All known digits plus ONE estimate |
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If the decimal is present
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Start on the left with 1st non-zero digit and count everything after that
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If the decimal is absent
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Start on right with 1st non zero digit present count everything after
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Mass
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Kilogram
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Length
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Meters
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Temperature
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Kelvin
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Liquid Volum
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Liter
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Density
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Gl Ml or GLcm3
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Time
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Seconds
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Kilogram
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1000
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Microgram
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100
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Gram
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10
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Milligram
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1/10
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Centigram
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1/100
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Megagram
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1/1000
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Homogeneous Mixture
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Solutions the same throughout same phase-liquid
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Heterogeneous
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See parts NOT the same throughout
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Physical Properties
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Melting Pt
Boiling Pt Ductile Malleability |
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Chemical Properties
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How/is it going to react
Unreactive |
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Chemical Change
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New Properties
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5 Indicators of a Chemical Change
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1. Precipitate (Solid)
2. Odor Change 3. Color Change 4. Energy Change 5. Does a gas form? |
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Physical Change
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Changing from one state to another without chemical change occurring
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Period
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Row
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Group
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Columns
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Family is another name for
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Period
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Metal
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Shiny, hard, dense
Form positive ions Good conductors Malleable and ductile |
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Metallloids
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Like metals and nonmetals
Semiconductors |
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Non Metals
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Brittle, usually solids and gases
form negative ions Poor conductors |
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Elements in the same...have similar properties because ....
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Column E- config.
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All...Are unreactive because they have a full octect (full s and p orbitals)
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Noble Gases
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Periodic Laws/Trends
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States that when elements are ordered by atomic number there is a predicable repetition of properties
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Atomic Radius
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Definition- Size two atoms
Trend Across- Decreasing Trend Down- Larger |
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Ionization Energy
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Definition- The energy to remove the most loosely held electrons
Trend Across- Increasing Trend Down- Decreasing |
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Electronegtivity
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Definition-Ability to attract electrons in a bond
Trend Across- Increasing Trend Down- Decreasing |
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Electron Shield
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The more energy levels you have the esier it is to loose a level
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Ionic Bounds
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High Melting pt
High Boiling pt Hard & Brittle Good conductors in water |
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What causes most of these properties?
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Crystal Lattice
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An Ionic bond is a bond between a ... and a nonmetallic element,
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Metal
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In Covalent Compounds electrons are .... In order to complete the atoms...
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Shared, Octet
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Covalent bond normally form between 2... elements
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Non-metals
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Properties of covalently bonded compounds
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2 nonmetals/metalloids
Weaker bonds Low melting pts Will NOT conduct electricity |
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Another name for covalent compounds is
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Molecular
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Reactants
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Anything left of a reaction
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Products
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Anything right of the reaction
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List the 7 diatomic elements
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N, O, F, Cl, Br, I
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We balance chemical equation because....cannot be created or destroyed 3 according to the law of conservation of...
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Mass, mass
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