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Matter

The atmosphere

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Chemistry
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Noble gases
Chemical elements
Matter
Chemistry
Optical materials
Argon
Xenon
Trace gas
Atmosphere
Neon
Gas
Environment
Technology

The atmosphere Made up of a mixture of gases (mainly N2 and O2) Mole fractions of major gases (nitrogen, oxygen, carbon dioxide, argon) are pretty constant with altitude ?interesting stuff? involves tiny amounts of trace gases ? ozone, oxides of nitrogen and sulfur and some others ~ 100% Breathing!!! Argon, Neon, Xenon ? rare gases often used in ?neon? lights Atmospheric gases can be separated by distillation, since they have different boiling points N2 77 K O2 90 K Ar 87 K Ne 24 K CH4 111 K Pressure profile of atmosphere Pressure drops almost exponentially with increasing altitude ... why?? Trop. Strat. Temperature profile in the atmosphere stratosphere pV = nRT ideal gas law is ?pretty good? (why??)

General Knowledge of the Elements

Subject: 
Chemistry
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Chemistry
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 lab

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Chemistry
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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

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