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Chemistry

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Chemistry Unit 2 notes

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Family- A column (the things up and down) in the periodic table.? Elements in the same group tend to have the same properties.? These are also called "families". ? group:? A column (the things up and down) in the periodic table.? Elements in the same group tend to have the same properties.? These are also called "families". ? period:? A row (left to right) in the periodic table. ? alkali metals:? Group I in the periodic table. ? alkaline earth metals:? Group II in the periodic table. ? halogen:? The elements in group 17.? They're really reactive. significant figure:? The number of digits in a number that tell you useful information. ? ionization energy:? The amount of energy required to pull an electron off of a gaseous atom.

General Knowledge of the Elements

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Periodic table
Matter
Atomic physics
Alkali metal
Block
Chemical element
Halogen
Valence electron
Nonmetal
Metalloid
Properties of metals, metalloids and nonmetals
Ten Most Abundant Elements in the Earth’s Crust 1. Oxygen 2. Silicon 3. Aluminum 4. Iron 5. Calcium 6. Sodium 7. Potassium 8. Magnesium 9. Titanium 10. Hydrogen General Element Knowledge 1. Good Conductor of Electricty — Copper 2. Diatomic elements — Halogens 3. Reactions based on ns2 valence shell — Alkaline earth metals 4. Most important commercial metal (after iron) — Aluminum 5. Used in wires — Copper 6. Soft, silvery metals — Alkali metals 7. Found as corundum (rubies, sapphires) — Aluminum 8. Allotrope — Aluminum 9. Cathode in Batteries — Lead 10. ? + Copper = Bronze — Tin 11. Fertilizer — Potassium 12. Ceramic found on spark plugs — Aluminum 13. Water treatment/antacids — Calcium 14. Detergents and bleach — Sodium 15. Carrying oxygen in blood — Iron

Chemistry review sheet

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Equilibrium chemistry
Inorganic solvents
Acids
Chemical elements
Solutions
Acid–base reaction
Electrolyte
Chemical reaction
Aqueous solution
Hydrogen
Solubility

Final Review Sheet Radio Active Decays Alpha decay occurs when the nucleus emits an alpha particle. Alpha particles have a positive charge and are equivalent in size to a helium nucleus, and so they are symbolized as . Alpha particles are the largest radioactive particle emitted. This type of radioactivity results in a decrease in the atomic number by 2 and a decrease in the atomic mass by 4. The equation below shows uranium-234 undergoing alpha decay:

chemistry lab

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Density
Aluminum building wiring
Graduated cylinder
Volume
Gauge
Physics
Chemistry
Matter

Using Density to Verify the Thickness of a Wire Purpose- To determine the density of aluminum and then determine the density of an aluminum wire Materials- Aluminum wire, Aluminum Shots, Water, Graduated Cylinder, Ruler, & Scale Procedures- Fill the graduated beaker with water. Measure the amount of mL and grams of water. Grab a handful of aluminum shots add it to the water. Measure the amount of mL and grams of water with the shots. Do steps 3 & 4 two more times. Then measure the aluminum wire?s weight and length using centimeters and grams. Find the calculated diameter of the wire. Data- Trial Mass of Aluminum Shot added (g) Initial volume of water (mL) Final volume of water + aluminum shot (mL) Volume of Aluminum Shot (mL) 1 10.5 50 54 4 2

AP Chemistry

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chapter 1-3
Chapter1 • Precision vs accuracy • Sig figs • Metrics • Classification of matter o Pure substances o Compounds, elements, mixtures o Examples o Homogeneous vs heterogeneous mixtures o Separation of mixtures • Dimensional analysis (show correct set-up, units, cancellations) • History of atomic theory o Dalton model o JJ Thomson o Plum pudding model o Rutherford’s experiment and model o Millikan’s experiment • Atomic structure o Atomic number o Mass number o Isotope designations o Ions • NOMENCLATURE • Atomic mass o Define  Calculate atomic mass, given isotope abundances  Disc why samples of elements with same mass rations as atomic mass mean equal number of atoms (Avogadro’s Hypothesis) • Mole o Define

Chemistry Review

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Everything covered in high school chemistry

Produced: Mastah E Chemistry Review Sheet 1 ? Chemistry is the study of matter and the changes it undergoes. ? A chemical is any substance that has a definite composition. This means it is always made of the same stuff no matter where the chemical comes form. Chemicals can exist naturally or be made. ? A chemical reaction is the process of which one or more substances are changed to produce one or more different substances. ? The recant is a substance or molecule that participates in a chemical reaction. When written in an equation, the reactants are on the left hand side ? Products are the substances produced from chemical reactions and are on the right hand side of the arrow in equations.

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