Introduction to Chemistry
Topic Review on "Title": 
Chemistry is an experimental science, therefore it is necessary to be able to work with units and measurements accurately.
Metric System
The metric system is based on prefixes that indicate a power of 10 with base units.
Metric Prefixes commonly used in chemistry 
Prefix 
Symbol 
Multiple 
Kilo 
k 
1000 
Deci 
d 
0.1 
Centi 
c 
0.01 
Milli 
m 
0.001 
Micro 
m 
0.000001 
Nano 
n 
0.000000001 
SI System
The International System of units gives a standard unit for each type of measurement.
SI Units commonly used in chemistry 
Measurement 
Unit 
Symbol 
Mass 
Kilogram 
kg 
Volume 
Liter 
L 
Temperature 
Kelvin 
K 
Length 
Meters 
m 
Time 
Seconds 
s 
Amount of substance 
Mole 
Mol 
Energy 
Joule 
J 
Charge 
Coulomb 
C 
There are also some important nonSI units as well.
NonSI Units commonly used in chemistry 
Measurement 
Unit 
Symbol 
Length 
Anstrom 
Å 
Pressure 
Atmosphere 
Atm 
Kilopascal 
kPa 
Energy 
Calorie 
cal 
Temperature 
Celcius 
°C 
Taking measurements
Measurements must be taken accurately. Always write down one more decimal place than the instrument tells for certain—a “0” if it’s “one the line” and a “5” if it’s “between the lines.”
Significant Figures
The significant figure rules are to allow people to read data or calculations and know with what precision the data was taken. The significant rules can be summarized in two rules: (1) If a decimal point is not present, count digits starting with the first the first nonzero number and ending with the last nonzero number; (2) If a decimal point is present anywhere in the number, start counting with the first nonzero number and continue until the end of the number. Rules on how to perform calculations with significant figures will be given in a future tutorial.
Fundamental Constants
Several numbers are used throughout chemistry and are important to be familiar with.
Fundamental constants commonly used in chemistry 
Name 
Symbol 
Constant 
Avogadro’s # 
NA 
6.02 X 1023 mol1 
Speed of light 
c 
3.0 X 108 m/s 
Gas constant 
R 
8.31 
0.0821 
Planck’s constant 
h 
6.63 x 1034 J·s 
Charge of electron 
e 
1.6 x 1019 C 
Atomic mass unit 
m 
1.66 x 1024 g 
Std Temp & Pressure 
STP 
273.15 K & 1 atm 

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"Title" Tutorial Summary : 
The Metric and SI (International System) of units is used throughout chemistry. The metric system is based on prefixes showing the power of 10 used with base units describing the quantity measured.
Chemistry is an experimental science; therefore it is necessary to take careful measurements. Measurements should always include one more decimal place than the instrument indicates for certain—this last decimal place should be a “0” if the measurement is “on the line” and a “5” if the measurement is “inbetween the lines.” Most measurements are understood to be +/ 1 in the last decimal place, unless another uncertainty value is given with the measurement.
Once careful measurements are taken, the precision with which they were measured can not be heightened while doing calculations, nor should it be lost and allowed to become less precise. Therefore, there are rules about counting “significant figures” which indicate which were measured for certain. Rules on performing calculations with significant figures will be introduced in a later tutorial.
There are many other “Basic skills” needed in chemistry, but they will be introduced throughout the tutorial series when they are needed.

Tutorial Features: 
Series Features:
 Concept map showing interconnections of new concepts in this tutorial and those previously introduced.
 Definition slides introduce terms as they are needed.
 Visual representation of concepts
 Animated examples—worked out step by step
 A concise summary is given at the conclusion of the tutorial.

"Title" Topic List: 
 The Metric and SI Systems
 Metric prefixes
 SI units
 Common nonSI units
 Measurement and Uncertainty
 Tools common in Chemistry Labs
 Taking measurements
 Uncertainty
 Significant Figures
 Why they’re used
 How to count them
 Fundamental Constants used in Chemistry
 Brief overview of topics to be included in future tutorials:
 The language of chemistry
 The periodic table
 Dimensional analysis
 Scientific notation
 Use of scientific calculators
 Tips for Studying Chemistry

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