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Journal Questions

Journal Questions. Define Valence Electron . What is the significance of valence electrons? Use your periodic table to figure out how many valence electrons Magnesium has. Explain Magnesium’s reactivity using it’s valence number. Periodic Table.

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Journal Questions

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  1. Journal Questions • Define Valence Electron. • What is the significance of valence electrons? • Use your periodic table to figure out how many valence electrons Magnesium has. Explain Magnesium’s reactivity using it’s valence number.

  2. Periodic Table • Organizes elements by physical and chemical properties.

  3. Outline Periodic Table • Make a Key: Blue for Metals, Yellow for Gases and Green for Metalloids • Outline Metalloids in Green – Boron, Silicon, down the right, down to the right, down to the right • Outline Gasses in Yellow • Outline Metals in Blue • Label the Side (1-7) Periods and add Shell drawings to Periods 1-3 • Label Top Groups and Families (1-3 and 13-18) and draw Lewis Structures • Box in Groups #’s – 1, 2, 13, 14, 15, 16, 17, 18 – Valence Electrons • Add APE MAN • Reactivity Arrow from Most Reactive to Least Reactive

  4. Periodic Table • The periodic table organizes elements by physical and chemical properties. M P E O L I T N I T N . G . D E N S I T Y M . E . L P T O I I N N G T REACTIVE

  5. Organized by groups The group number is an identifier used to describe the column of the standard periodic table in which the element appears. Groups 1-2 (except hydrogen) and 13-18 are termed main group elements. Groups 3-11 are termed transition elements. Transition elements are those whose atoms have an incomplete d-subshell Groups are Numbered (How many groups are there on the PT? ) Group number tells how many valence electrons A Group is called a Family – elements in the same family React the same

  6. Pair/Share • What are the 3 main “groups” on the Periodic Table? • Can you name some characteristics of each group?

  7. Example - Alkali Metals • Group 1 • The alkali metals are silver-colored (caesium has a golden tinge), soft, low-density metals. • These elements all have one valence electron which is easily lost to form an ion with a single positive charge. • This makes them very reactive and they are the most active metals. • Due to their activity they occur naturally in ionic compounds not in their elemental state.

  8. Alkaline Earth Metals • Group 2 • The alkaline earth metals are silvery colored, soft, low-density metals, though are a bit harder than the alkali metals. • These elements all have two valence electrons and tend to lose both to form ions with a two plus charge.

  9. Noble Gases • Group 18 of the periodic table • The noble gasses are all non-metals and are characterized by having completely filled shells of electrons. • In general this makes them very unreactive chemically since it is difficult to add or remove electrons. • Physically they exist as monatomic gases at room temperature.

  10. Organized by periods horizontal rows Show how many electron shells there are how many periods are there? atomic number increases from left to right

  11. Pair/Share • What are 3 new ways you have learned that the Periodic Table is organized?

  12. Name That Element!

  13. Who am I? • I am a metal • I am pretty reactive • I have a valence number of 2 • I need 3 shells to fit my electrons • Who am I??

  14. Who am I? • I am not a good conductor of heat • I am a noble gas • I have 10 neutrons in my nucleus • Who am I???

  15. Who am I? • I am a liquid at room temperature • I am in the Zinc family • When I am stable, I have 80 electrons in my orbitals • Who am I??

  16. Who am I? • I am a good conductor of electricity • I can be found in batteries • I need 2 shells to fit my electrons • I have 3 electrons • Who am I??

  17. Who am I? • I am in Group 13 • I have a valence number of 3 • I have some properties like metals and some like non-metals • Who am I?

  18. Who am I? • I am a very reactive element • I have only 1 valence electron • I have more neutrons than protons in my atoms • I require 3 shells to fit my electrons • Who am I??

  19. Who am I? • I am a non-metal • I am found in many compounds • I am the only element that has no neutrons • Who am I??

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