1. Activity 16: Elements and the Periodic Table Warm up: what are the 4 families on the periodic table? Try to go in order. Name a characteristic of each family you listed.

3. First Quarter Feedback Form You do not have to write your name on it. Please be honest and fair. Do not be concerned with what your neighbor is putting. You are your own person! When finished, place in gray “turn in” bin.

4. Activity 15 Analysis Questions Reminder: the UC assessment was due today! The last day I will accept any late work from Activity 12- Activity 15 is Wednesday.

5. Activity 15 In Case You Missed It... Elements can be organized into families based on their properties, such as reactivity or atomic mass. Atom- building block of matter Atomic mass- mass of one atom in an element. – Unit: atomic mass unit (amu) – Example: Carbon’s atomic mass is 12.01 amu

6. Activity 15 In Case You Missed It... The periodic table is categorized into 4 families, which are columns. Alkali metals, alkaline earth metals, halogens, and noble gases. All members of the family have the same reactivity and bonds to hydrogen.

7. Activity 15 In Case You Missed It... Atomic mass increases as you move down a family. Less atomic mass More atomic mass

8. Activity 16: Elements and the Periodic Table Of the four families we investigated, which 2 seemed most alike? Was there a family that was most different from the others? What kinds of properties can you use to distinguish groups of elements?

9. Activity 16: Elements and the Periodic Table Jigsaw Reading: – Each group will be assigned a section(s) of the text to read. – Read it silently first, then discuss with your group what you think the 2-3 most important things are. – Come up with a way to effectively teach this to the class. Be creative AND effective/engaging! – Each group will teach section to the class. – Be sure to address the “Stopping to Think” questions!

10. Jigsaw Reading Instructions Read the section assigned to you silently. Discuss it with your group to decide the most important parts. Teaching the class: – State the most important parts – Read the “Stopping to Think” questions and answers – Use diagrams or pictures – Be prepared to answer questions!

11. Jigsaw Notes Discovering Elements/Mendeleev and Periodic Table of Elements –1600s- scientists discover basic elements. –1869- Dmitri Mendeleev, 63 known elements –Mendeleev- data from other scientists to figure out properties, saw patterns, made periodic table.

12. Jigsaw Notes Modern Periodic Table –Atomic number- location on periodic table –Symbol- Capital letter or capital and lowercase. –Full name –Atomic mass –Metals and nonmetal divider. Edge of line= metalloids. Metalloids are not as strong as metal but not as weak an nonmetals. (Hg is a liquid metal at room temp.) –Right to left- more reactive. Alkali are most, noble gases are the least.

13. Jigsaw Notes Forming Compounds –Compounds- contain 2 or more elements held together by chemical bonds. Cannot be undone naturally. Creates new substance. Properties independent of the elements it is made of. Ex: water is H 2 O, hydrogen and oxygen are normally gases but form a liquid when bonded

14. Jigsaw Notes Chemical Names and Formulas –Chemical formula- short way to identify kind and number of atoms H 2 0- 2 hydrogens and an oxygen. –Names of compounds identify the elements that make them up. NaCl- sodium chloride, table salt

15. Jigsaw Notes Classifying Matter –Anything with mass and volume is matter. Matter can be an element, compound, or a mixture of both.

16. Chemical Compounds Matt 5:13 “You are the ____ of the earth,” made of sodium and chlorine: Dry ice is a solid form of this compound: Table sugar has 12 carbons, 22 hydrogens, and 11 oxygens. What is the compound?

17. Tonight’s Homework Complete Activity 16 analysis questions before our next class. Remember that any late work/make-up labs need to be completed before Wednesday at 7:55 am!