1.1 Chemistry: The Central Science

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1.9 Measurement and Significant Figures • Every experimental measurement has a degree of uncertainty. • <strong>The</strong> value recorded should use all the digits known with certainty, plus one estimated digit. • Significant figures—<strong>The</strong> number of meaningful digits used to express a value.
1.9 Measurement and Significant Figures Rules for Significant Figures Rule 1: Zeros in the middle of a number are like any other digit; they are always significant. Rule 2: Zeros at the beginning of a number are not significant; they act only to locate the decimal point. Rule 3: Zeros at the end of a number and after the decimal point are significant. It is assumed that these zeros would not be shown unless they were significant. Rule 4: Zeros at the end of a number and before an implied decimal point may or may not be significant.
Page 1 and 2: 1.1 Chemistry: The Central Science
Page 3 and 4: 1.2 States of Matter Many substance
Page 5 and 6: 1.3 Classification of Matter Compon
Page 7 and 8: 1.4 Chemical Elements and Symbols
Page 9 and 10: 1.4 Chemical Elements and Symbols
Page 11 and 12: 1.6 Chemical Reactions: An Example
Page 13 and 14: 1.7 Physical Quantities Scientists
Page 15 and 16: 1.7 Physical Quantities
Page 17: 1.8 Measuring Mass, Length, and Vol
Page 21 and 22: 1.10 Scientific Notation • Scient
Page 23 and 24: 1.10 Scientific Notation • To con
Page 25 and 26: 1.12 Problem Solving: Unit Conversi
Page 27 and 28: 1.12 Problem Solving: Unit Conversi
Page 29 and 30: 1.13 Temperature, Heat, and Energy
Page 31 and 32: 1.13 Temperature, Heat, and Energy

1.1 Chemistry: The Central Science

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