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Warm Up

Warm Up. Essential Questions. EQ: How is the PToE organized? HOT Q1: What are the properties of the alkali metals? Noble gases? Halogens? HOT Q2: What are “valence electrons”? HOT Q3: How do we draw electron configurations?. Sort the following cars into groups:. Agenda. Warm Up/Objective

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Warm Up

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  1. Warm Up Essential Questions EQ: How is the PToE organized? HOT Q1: What are the properties of the alkali metals? Noble gases? Halogens? HOT Q2: What are “valence electrons”? HOT Q3: How do we draw electron configurations? • Sort the following cars into groups:

  2. Agenda • Warm Up/Objective • Test Return/Tracking • Meet the Periodic Table! • Valence Electron Re-Loop • Exit Ticket

  3. Test Return / Tracking • Averages:

  4. Video: Elements and The Periodic Table Background Info: Element: The “building blocks” of matter – cannot be broken down by physical or chemical means

  5. Video: Elements and The Periodic Table Grab PToE and colored pencils! 1. Why do companies put rubber handles on metal pots?

  6. Metalloids Boron, Silicon, Germanium, Arsenic, Antimony, Tellurium , Astatine

  7. Concensus • The elements can be sorted into three groups: metals, non-metals, and metalloids. • Metals have luster, malleability and conduct heat and electricity • Nonmetals are brittle and poor conductors • Metalloids have properties of both metals and nonmetals

  8. Videos: Alkali Metals, Halogens, and Noble Gases Background Info: Groups (Also called “Families”): Columns (go up and down) on PToE Periods: Rows (go across) on PToE

  9. Video: Alkali Metals Bananas are a great source of ________.

  10. Video: Halogen Group • What chemical goes in pools?

  11. Video: Noble Gases 1. What’s inside Neon signs?

  12. Consensus • Elements in the same group have similar chemical properties • Elements on the far right (the Noble gases) are the least reactive • Elements on the far left (the alkali metals) are the most reactive.

  13. Elements are sorted into groups or families (vertical columns) based on their chemical properties … but what determines these chemical properties?

  14. Consensus (cont’d) • The specific properties of an element are caused by the number of VALENCE ELECTRONS it has • Valence electrons = electrons on the outermost shell

  15. Wait… what?! What are electron shells???

  16. The shell closest to the nucleus is PRIME real estate. Only two electrons get to live there. As you go farther from the nucleus, shells get less exclusive.

  17. NOTES Electron Shells Electrons will the fill the shells nearest to the nucleus first!!! How shells fill: BUT you cannot have more than 8 electrons in the outermost shell!!! Electrons in the outermost shell = valence electrons

  18. Let’s look at an example on WS 5.1 Beryllium Atomic number: Protons: Neutrons: Atomic mass: 9 Valence Electrons:

  19. Another example… Magnesium Atomic number: Protons: Neutrons: Atomic mass: 24

  20. Partner Practice • Draw the electron configuration for a Argon atom with a mass number of 40 amu. State the number of protons, electrons, and neutrons and VALENCE ELECTRONS • Remember…

  21. Partner Practice • Draw the electron configuration of a Neon atom with a mass number of 20. State the number of protons, electrons, and VALENCE ELECTRONS.

  22. Partner Practice • Draw the electron configuration of an oxygen atom with a mass number of 16. State the number of protons, electrons, and neutrons and VALENCE ELECTRONS.

  23. Get out your PToE!

  24. Group 1 (alkali metals) have 1 valence electron

  25. Group 2 (alkaline earth metals) have 2 valence electrons

  26. Group 13 elements have 3 valence electrons

  27. Group 14 elements have 4 valence electrons

  28. Group 15 elements have 5 valence electrons

  29. Group 16 elements have 6 valence electrons

  30. Group 17 (halogens) have 7 valence electrons

  31. Group 18 (Noble gases) have 8 valence electrons, except helium, which has only 2

  32. Transition metals (“d” block) have 1 or 2 valence electrons

  33. Lanthanides and actinides (“f” block) have 1 or 2 valence electrons

  34. Valence electrons 1 8 2 3 4 5 6 7 1 or 2 1 or 2

  35. Worksheet 5.1 • Fill it out. Fill it out.

  36. Exit Ticket Fluorine Atomic number: Protons: Neutrons: Atomic mass: 19 Valence Electrons:

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