Chapt. 1 - Timberlake
Quiz yourself by thinking what should be in
each of the black spaces below before clicking
on it to display the answer.
Help!
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| How is WEIGHT different from MASS? | Weight - is a measure of the pull of gravity Ex. a man weighs 165 lbs on earth, but only 27.5 lbs on the moon
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| Unit for mass in metric system | GRAM - 454 g = 1lb.
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| Significant figures | In a measured number, significant figures are all the digits including the estimated digit
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| Measure numbers | Measured numbers are obtained when one measures a quantity
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| How to tell what is a significant number? (4) | 1. Not a zero 2. a zero between nonzero digits 3. a zero at the end of a decimal number 4. any digit in a coefficient of a number written in scientific notation
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| Exact numbers | Exact numbers are clearly defined (60 minutes in an hour)
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| Round off rules (2) | if four or less, round down, 5 or more, round up
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| Multiplication & division-significant numbers | In multiplication or division, final answer contains #of significant figures as the measurement with the FEWEST significant figures Ex. 24.65 x 0.67 = 16.5155 - round to 17 (because 0.67 has just TWO significant figures)
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| Prefixes - trillion, billion, million & thousand | 1. trillion - tera 2. billion - Giga 3. Million - MEGA 4. thousand - Kilo
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| Prefixes (decrease size of unit) | tenth, hundredth, thousandth, millionth, billionth, trillionth, quadrillionth
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| tenth, hundredth, thousandth, millionth, billionth, trillionth, quadrillionth | tenth-deci, hundredth-cent, thousandth-milli, millionth-micro, billionth-nano, trillionth-pico, quadrillionth -femto
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| cm3 - cubic centimeter-dimensions | 1 cm x 1 cm x 1 cm- measures VOLUME and equals 1 mL = 1cm3 = 1cc
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| Mass - how is "weight" recorded? | In kilograms
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| Density | RELATIONSHIP of the MASS of object to its VOLUME
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| Density measurements | grams per cubic centimeter (g/cm3) grams per milliliter (g/mL) or grams per liter (g/L)
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| 6.00 divided by 0.2000 | 30.0 - because when dividing, the answer must have same number of significant figures as the one with fewest digits--sometimes you have to add
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| d = m divided by V | Remember: alphabetically divide so that DENSITY = Mass divided by Volume
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| Add decimals | Answer should have same number of DECIMALS as that having fewest decimal places
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| 1 mL equals (write 3 ways) | 1 mL = 1 cm 3power = 1cc = .001 liter
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| how many 3s, 3p & 3d orbitals are there? | 1, 3 & 5 respectively
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| atomic radius | Size sinks, radius says size, radius sinks to bottom
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| Size - rank Boron, chlorine, flourine & alumimium (look at position on chart-bottom left corner is biggest in size) | flourine<boron<chlorine<aluminum
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Review the information in the table. When you are ready to quiz yourself you can hide individual columns or the entire table. Then you can click on the empty cells to reveal the answer. Try to recall what will be displayed before clicking the empty cell.
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To hide a column, click on the column name.
To hide the entire table, click on the "Hide All" button.
You may also shuffle the rows of the table by clicking on the "Shuffle" button.
Or sort by any of the columns using the down arrow next to any column heading.
If you know all the data on any row, you can temporarily remove it by tapping the trash can to the right of the row.
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Created by:
walterina4327
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