Chem final Notecard

# Chem final Notecard - Non-zero digits are always...

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Non-zero digits are always significant. ( 22 has 2; 22.3 has 3)……….With zeroes, a. Zeroes placed before other digits are not significant; 0.046 has two significant digits. b. Zeroes placed between other digits are always significant; 4009 kg has four significant digits. c. Zeroes placed after other digits but behind a decimal point are significant; 7.90 has three significant digits. d. Zeroes at the end of a number are significant only if they are behind a decimal point as in (c). Otherwise, For example, in the number 8200, use scientific notation to place significant zeroes behind a decimal point: 8.200 10 3 has four significant digits;8.20 10 3 has three significant digits;8.2 10 3 has two significant digits uncertainty in R is calculated: Addition & Subtraction Multiplication & Division 1 millimeter = 1/1,000 meter 1 centimeter = 1/100 meter 1 decimeter = 1/10 meter 1 dekameter = 10 meters 1 kilometer = 1,000 meters 1 inch = 2.54 centimeters 1 foot = 0.305 meter 1 mile = 1.609 kilometers 1 cubic centimeter = 1/1,000,000 cubic meter 1 cubic decimeter = 1/1,000 cubic meter 1 cubic meter = 1 stere (basic unit of volume) 1 milliliter = 1/1,000 liter = 1 cubic centimeter 1 cubic centimeter = 0.06 cubic inch 1 milligram = 1/1,000,000 kilogram = 1/1,000 gram 1 centigram = 1/100,000 kilogram = 1/100 gram 1 decigram = 1/10,000 kilogram = 1/10 gram 1 gram = 1/1,000 kilogram 1 dekagram = 1/100 kilogram = 10 grams 1 hectogram = 1/10 kilogram = 100 grams 1 1 Hydrogen H 1s 1 2 4 Helium He 1s 2 3 6.9 Lithium Li [He]2s 1 4 9 Beryllium Be [He]2s 2 5 10.8 Boron B [He]2s 2 2p 1 6 12 Carbon C [He]2s 2 2p 2 7 14 Nitrogen N [He]2s 2 2p 3 8 16 Oxygen O [He]2s 2 2p 4 9 18.9 Flourine F [He]2s 2 2p 5 10 20.2 Neon Ne [He]2s 2 2p 6 11 23 Sodium Na [Ne]3s 1 12 24 Magnesium Mg [Ne]3s 2 13 26.9 Aluminum Al [Ne]3s 2 3p 1 14 28 Silicon Si [Ne]3s 2 3p 2 15 31 Phosphorus P [Ne]3s 2 3p 3 16 32 Sulfur S [Ne]3s 2 3p 4 17 35 Chlorine Cl [Ne]3s 2 3p 5 18 40 Argon Ar [Ne]3s 2 3p 6 19 39 Potassium K [Ar]4s 1 20 40 Calcium Ca [Ar]4s 2 24 52 Chromium Cr [Ar]3d 5 4s 1 25 54.9 Manganese Mn [Ar]3d 5 4s 2 26 55.8 Iron Fe [Ar]3d 6 4s 2 27 58.9 Cobalt Co [Ar]3d 7 4s 2 28 58.7 Nickel Ni [Ar]3d 8 4s 2 29 63.5 Copper Cu [Ar]3d 10 4s 1 30 65.4 Zinc Zn [Ar]3d 10 4s 2 35 79.9 Bromine Br [Ar]3d 10 4s 2 4p 5 36 83.8 Krypton Kr [Ar]3d 10 4s 2 4p 6 37 85.5 Rubidium Rb [Kr]5s 1 38 87.6 Strontium Sr [Kr]5s 2 43 98 Technetium Tc [Kr]4d 5 5s 2 53 126.9 Iodine I [Kr]4d 10 5s 2 5p 5 54 131.3 Xenon Xe [Kr]4d 10 5s 2 5p 6 55 132.9 Cesium Cs [Xe]6s 1 56 137.3 Barium Ba [Xe]6s 2 64 157.3 Gadolinium Gd [Xe] 4f 7 5d 1 6s 2 Periodic groups: vertical column Periodic columns: horizontal row Alkalis: group1 Alkaline earths: group2 Metalloids: staircase beginning with boron to Polonium Transition metals: center block (require roman numerals) Prefix Symbol Magnitude Multiply by Giga G 10^9 1,000,000,000 Mega M 10^6 1,000,000 Kilo k 10^3 1,000 Hector h 10^2 100 Deka da 10 10 - - - - Deci d 10^-1 0.1 Centi c 10^-2 0.01 Milli

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Chem final Notecard - Non-zero digits are always...

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