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Ch. 17 Quick Write

Ch. 17 Quick Write. Using ANY previous knowledge you have, spend 5 minutes writing about the following things: What are the positive and negative parts of an atom called? Explain why the periodic table is important in the world of science. Draw or verbally explain the structure of an atom.

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Ch. 17 Quick Write

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  1. Ch. 17 Quick Write • Using ANY previous knowledge you have, spend 5 minutes writing about the following things: • What are the positive and negative parts of an atom called? • Explain why the periodic table is important in the world of science. • Draw or verbally explain the structure of an atom. Chapter 17

  2. Chapter 17: Atoms and the Periodic Table What is your age? What grade are you in? What are your initials? What are some other ways that people are categorized and named? Chapter 17

  3. 17.1 Elements contain a single kind of atom • A. Element = Single kind of atom • What is an atom? • Element Examples? Gold, Nitrogen, Graphite in pencils • All listed on chart called periodic table • Atomic symbol – letters that stand for a symbol • Like initials • Only first letter capitalized • Examples? C, O, Na, Au Chapter 17

  4. 17.1 Elements contain a single kind of atom There are more atoms in a breath of air than the total number of humans since time zero! • B. Atoms • 1. Too small to see • 2. Made up of smaller, subatomic parts: • electrons (e-), neutrons (n), protons (p) • 3. Nucleus – contains protons & neutrons • 4. Electrons surround the nucleus Chapter 17

  5. Group Activity • Turn in your books to page 305. • Discuss Exercise 1 and 2 using what you know about atoms. Chapter 17

  6. 17.2 Atoms are mostly empty space Why does it matter that atoms are mostly empty space? • Atoms are mostly empty space • 1. Only electron repulsion keeps atoms from passing through one another • 2. Touching is actually • repulsing! Chapter 17

  7. Chapter 17

  8. 17.4 Protons and Neutrons Determine Mass Number and Atomic Mass • E. Isotopes • Mass Number – number of protons & neutrons • Mass number – Atomic number = number of neutrons • Example: Carbon has a mass number of 12 and an atomic number of 6, how many neutrons does it have? • Atomic mass = total mass of an • atom • *Assignment: Mass and Atomic Number WS Chapter 17

  9. Quick Activity • Group the following fruits: orange, apple, banana, kiwi, strawberry, watermelon, cantaloupe, grape, peach, apricot, plum, nectarine. • You must have at least 2 groups and no more than 5. Discuss as a group why you’ve classified the fruit the way you have. What are some features or characteristics that made you put the fruit into the groups? Chapter 17

  10. Chapter 17

  11. 17.5 Elements are organized in the Periodic Table by Their Properties • F. Grouping elements • Metals • Shiny, opaque, good conductors • Malleable • Ductile – can be pulled into wires • Mostly solid at room temperature • Examples: sodium, magnesium, gold, mercury, iron What are characteristics of metals? Chapter 17

  12. 17.5 Elements are organized in the Periodic Table by Their Properties What are characteristics of nonmetals? • Nonmetals – Right side of the table • Poor conductors • Can be transparent • Brittle and shatter when hammered • Solid, liquid, or gas • Examples: sulfur, oxygen, chlorine, iodine, fluorine Chapter 17

  13. 3. Metalloids – between metals and nonmetals • Weak conductors of electricity, • used as semiconductors in computers • More metallic properties • Examples: Boron, Silicon What are properties of metalloids? Chapter 17

  14. 17.6 A Period is a Horizontal Row, a Group is a Vertical Column What is the difference between a period and a group? • Periods and Groups • Horizontal row = Period • Atomic size gets smaller from left to right • Vertical row = Group • Similar properties • Atomic size gets larger from top to bottom • Alkali (A-1), Alkaline-earth (A-2), Transition (middle), Halogens (form salts, 17-S), Noble Gases (kings, end) Chapter 17

  15. Partner Assignment (10-15 Min) • Read 17.5-17.6 (pg. 297-303) • The Notquite Table of the Elements WS – working in pairs, correct the worksheet to make the table and the statements correct Chapter 17

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