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Ch.1: Matter and Change

Ch.1: Matter and Change. 1.1 Chemistry. Sciences. used to be divided into strict categories physical (nonliving) biological (living) Chemistry has parts that fall under both categories many sciences are so interrelated that you can’t categorize them in those ways anymore. Chemistry.

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Ch.1: Matter and Change

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  1. Ch.1: Matter and Change 1.1 Chemistry

  2. Sciences • used to be divided into strict categories • physical (nonliving) • biological (living) • Chemistry has parts that fall under both categories • many sciences are so interrelated that you can’t categorize them in those ways anymore.

  3. Chemistry • study of matter and the changes it undergoes • chemists use instruments to improve their ability to observe and make measurements

  4. Chemistry • chemists work with chemicals (any substance with definite composition) • all matter has chemical basis whether it is living or nonliving

  5. Branches of Chemistry • organic- study of compounds containing carbon • inorganic- study of compounds that aren’t organic • physical- study of changes of matter and their energy

  6. Branches of Chemistry • analytical- study of composition of materials • biochemistry- study of substances and processes in living things • theoretical- use of math and computers to understand chemical behaviors and design new compounds

  7. Types of Research • Basic Research- done to increase knowledge • Applied Research- done to solve a problem • Technological Development- done to improve quality of life • technology – application of knowledge (usually scientific) for practical purposes

  8. Ch. 1: Matter and Change 1.2 Matter and Its Properties

  9. Terms • Matter- anything that has mass and volume • Atom- smallest unit of an element that keeps the properties of element • Element- pure substance made of only one type of atom • Compound- substance made of 2 or more types of atoms that are chemically bonded • Molecule- type of compound in which bonds are covalent bonds

  10. Properties of Matter • chemists use characteristic properties to tell substances apart and to separate them • some properties define a group of substances

  11. Types of Properties • Extensive- depend on the amount of matter • Ex: volume, mass, amount of energy • Intensive- do not depend on the amount • Ex: density, boiling point, ability to conduct

  12. Physical- characteristics that can be observed or measured without changing the identity of a substance Chemical- relates to a substances ability to undergo changes that transform it into a different substance Easiest to see when a chemical is reacting Types of Properties

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