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Matter and Energy
Shaun Williams, PhD
Identify the nonmetals in the following figure. Explain the characteristics you considered in making your decision.
Solid | Liquid | Gas |
---|---|---|
Fixed shape | Shape of continaer (may or may not fill it) | Shape of container (fills it) |
Its own volume | Its own volume | Volume of container |
No volume change under pressure | Slight volume change under pressure | Large volume change under pressure |
Particles are fixed in place in a regular array | Particles are randomly arranged and free to move about until they bump into one another | Particles are widely separated and move independently of one another |
Name | Symbol |
---|---|
helium | He |
fluorine | F |
silver | Ag |
water | \(\chem{H_2O}\) |
carbon dioxide | \(\chem{CO_2}\) |
methane (natural gas) | \(\chem{CH_4}\) |
Name | Symbol |
---|---|
solid | (s) |
liquid | (l) |
gas | (g) |
aqueous (dissolved in water) | (aq) |
Normal Notation | Scientific Notation |
---|---|
3245. | \( 3.245 \times 10^3 \) |
0.000003245 | \( 3.245 \times 10^{-6} \) |
3,245,000,000 | \( 3.245 \times 10^9 \) |
0.0050607 | \( 5.0607 \times 10^{-3} \) |
88. | \( 8.8 \times 10^1 \) |
2.45 | \( 2.45 \times 10^0 \) |
Here is a simpler method for determining the number of significant figures in a given measurement.
Unit | Symbol | Quantity |
---|---|---|
meter | m | length |
kilogram | kg | mass |
second | s | time |
ampere | A | electric current |
Kelvin | K | temperature |
mole | mol | amount of substance |
Prefix | Factor | Symbol |
---|---|---|
giga | \( 10^9 \) | G |
mega | \( 10^6 \) | M |
kilo | \( 10^3 \) | k |
deci | \( 10^{-1} \) | d |
centi | \( 10^{-2} \) | c |
milli | \( 10^{-3} \) | m |
micro | \( 10^{-6} \) | μ |
nano | \( 10^{-9} \) | n |
A possible approach to problem solving involves 4 steps:
/