Chapter 1 Lecture

Chapter 1 Lecture - Chapter 1 Matter and Energy Questions...

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Matter and Energy Chapter 1
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Questions for consideration 1. What characteristics distinguish different types of matter? 2. What are some properties of matter? 3. What is energy and how does it differ from matter? 4. What approaches do scientists use to answer these and other questions?
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Math tools used 1. Scientific notation 2. Significant figures 3. Units and conversions
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What Is Science? The scientists' assessment of a recent MIT paper on quantum physics. © Copyright 2006, Onion, Inc. All rights reserved .
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Is the study of matter, its properties, the changes that matter undergoes, and the energy associated with these changes.
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Definitions Matter: anything that has mass and volume Mass: measure of the quantity of matter in an object Weight: measures the gravitational force between two objects - Weight varies with strength of gravitational force
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On the planet Mercury gravity is 0.376 times that on Earth. (a) What would be the mass on Mercury of a person who has a mass of 62.5 kilograms (kg) on Earth? (b) What would be the weight on Mercury of a person who weighs 124 pounds (lb) on Earth? Mass and Weight
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Substances • Substances - definite fixed compositions that do not vary from sample to sample i.e., pure water
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Definitions for Components of Matter Element - simplest type of substance with unique physical and chemical properties. - consists of only one type of atom -cannot be broken down into any simpler substances by physical or chemical means. Compound - a substance composed of two or more elements which are chemically combined.
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Definitions for Components of Matter Molecule - consists of two or more atoms that are chemically bound together - behaves as an independent unit.
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Names, symbols and the periodic table Please memorize the elements listed in the syllabus!
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Names, symbols and the periodic table Each element is assigned a unique atomic number .
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Names, symbols and the periodic table Each symbol comprises one or two letters Always write the first letter (and only the first letter) in UPPER CASE i.e. CO is carbon monoxide and Co is the element cobalt
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Names, symbols and the periodic table The periodic table contains 18 numbered groups of elements (vertical columns) and 7 numbered periods (shown as horizontal rows) Each group or family of elements has a characteristic set of chemical properties
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Names, symbols and the periodic table Main group or representative elements
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Names, symbols and the periodic table Transition elements Lanthanum and actinium series make up the inner transition elements
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Metals are shown in blue, aquamarine and cyan? Metalloids are shown in green
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Chapter 1 Lecture - Chapter 1 Matter and Energy Questions...

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