1. Bellringer 9/15 1.Convert 0.62 miles into meters Conversion factor: 1km= 0.62mi

2. Element(ary) my dear Watson Element: a substance that cannot be broken down into simpler/other substances – Made of only 1 kind of atom – Atoms are identified based on their atomic number and mass Atomic Number: the number of protons in an atom Atomic Mass: the number of protons + neutrons in an atom

3. A Typical box on the periodic table:

4. The 3 types of Elements

5. Important Families on the periodic table Column and name Characteristics Alkali metals Extremely soft – cut with a butter knife Most reactive metals Not found as a pure metal in nature Alkali earth metals Soft but not as soft as alkali metals Second most reactive metals Not found as a pure metal in nature but has its uses Magnesium fire starters.

6. Weekly Writing: “Why is it important for you to understand the difference between the elements? When will you ever need this in real life?” 1 paragraph with 5 sentences Due: Friday 9/18

7. Exit Slip 9/15 1.How many metals are there? 2.How many nonmetals are there? 3.How many metalloids are there?

8. Bellringer 9/16 1.What are 2 properties of alkali metals? 2.What are 2 properties of alkali earth metals?

9. Important Families on the periodic table Column and name Characteristics Alkali metalsAlkali earth metals Halogens Most reactive nonmetals Combine with alkali and alkali metals to make Salts like NaCl Used as Disinfectants Noble Gases NO REACTION

10. Color the Periodic Table Assignment - Each element has two characteristics they can be classified as: Phase Type Solid, liquid, or gas Metal, nonmetal, or metalloid Liquids – Br and Hg Gases – H, He, N, O, F, Cl, Ne, Ar, Xe, Kr, Rn Metal – Every element to the left of the stair step Nonmetal – Everything to the right of the stair step Solids- The rest Metalloid (Semiconductors) – One square right and left of the stair step except for aluminum

11. The properties of the elements MetalsNonmetals Metalloids are in-between The most important is silicon - Lustre – Shininess -Malleable – Being able to flatten and bend -Ductile – Can stretch or be pulled -Conductive – Heat and Electric - Dull – no luster -Brittle – Cracks, fractures, and breaks easily in solid form -Insulator – Does not allow Heat and Electric to pass

12. Atomic Radius: distance between 2 nuclei of an element

13. Exit Slip 9/16 1.What are the 4 properties of metals? 2.What are the 3 properties of non-metals?