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First Five 9/29 1. To the best of your current knowledge, what is the definition of:

Schedule First Five Review Test/ Pre test Atom, Ion, Molecule notes Skit Preparation HW: Study Guide 2.1 and 2.2 – Due Tomorrow GQ: What is the smallest bit of gold you can have?. First Five 9/29 1. To the best of your current knowledge, what is the definition of:

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First Five 9/29 1. To the best of your current knowledge, what is the definition of:

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  1. Schedule • First Five • Review Test/ Pre test • Atom, Ion, Molecule notes • Skit Preparation • HW: Study Guide 2.1 and 2.2 – Due Tomorrow • GQ: What is the smallest bit of gold you can have? First Five 9/29 1. To the best of your current knowledge, what is the definition of: An atom? An Ion? A Molecule? 2. Take out your Characteristics of life wkst. Even if you do not know, guess!

  2. KEY CONCEPTAll living things are based on atoms and their interactions.

  3. H O Living things consist of atoms of different elements. • An atom is the smallest basic unit of matter. • An element is one type of atom. Hydrogen atom (H) Oxygen atom (O)

  4. Schedule • First Five • Atom, Ion, Molecule notes Finish • Skit Preparation and Presentation • HW: Study Guide 2.1 and 2.2 – Due Today • All make-up due Friday 10/3 • GQ: How are the three types of bonds different? • First Five 9/30 • Without looking at your notes; what are the three particles of an atom and their charges? • Place your study guide on the TA’s desk.

  5. Oxygen atom (O) outermost energy level: 6 electrons (-) Nucleus:8 protons (+)8 neutrons inner energy level: 2 electrons (-) • An atom has a nucleus and electrons. • The nucleus has protons and neutrons. • Electrons are in energy levels outside nucleus.

  6. _ O H H + + • A compound is made of atoms of different elements bonded together. • water (H2O)

  7. A compound is made of atoms of different elements bonded together. • carbon dioxide (CO2) • water (H2O)

  8. A compound is made of atoms of different elements bonded together. • many other carbon-based compounds in living things • water (H2O) • carbon dioxide (CO2)

  9. gained electron Na loses anelectron to CI ionic bond Sodium atom (Na) Chlorine atom (CI) Sodium ion (Na+) Chloride ion (CI-) Ions form when atoms gain or lose electrons. • An ion is an atom that has gained or lost one or more electrons. • positive ions • negative ions • Ionic bonds form between oppositely charged ions.

  10. covalent bonds Oxygen atom (O) Carbon atom (C) Oxygen atom (O) Carbon dioxide (CO2 ) Atoms share pairs of electrons in covalent bonds. • A covalent bond forms when atoms share a pair of electrons. • multiple covalent bonds • diatomic molecules

  11. _ O H H + + Hydrogen Bonds are between the hydrogen atoms and oxygen atoms of two polar molecules

  12. Schedule • First Five/new seats • Skit Presentation • Water wonders lab • HW: Water wonders Lab – due Thursday • All make-up due Friday 10/3 • GQ: How do the properties of water affect life? • First Five 10/1 • Without looking at your notes; Explain the hydrogen bond to the best of your ability.

  13. Schedule • First Five • Water wonders lab • HW: Water wonders Lab – due Tomorrow • All make-up due tomorrow 10/3 • GQ: How do the properties of water affect life? • First Five 10/2 • What are the three types of bonds? • Please get started quickly as we have just today to finish the lab.

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