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Chapter 10 Lesson 2

After Quiz: In your notebook, answer the following questions. USE FULL SENTENCES AND RE-STATE THE QUESTIONS. 1. Which of the following metals would be most likely to react similarly with other elements. Tell why you know this. Elements: calcium, cobalt, potassium, copper, silver

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Chapter 10 Lesson 2

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  1. After Quiz: In your notebook, answer the following questions. USE FULL SENTENCES AND RE-STATE THE QUESTIONS. • 1. Which of the following metals would be most likely to react similarly with other elements. Tell why you know this. • Elements: calcium, cobalt, potassium, copper, silver • Elements: lithium, titanium, magnesium, potassium • Evaluate the physical properties of potassium, magnesium and copper. Select the best choice to use for a building project. Explain why this metal is the best building material to use.

  2. Chapter 10Lesson 2 Metals

  3. Physical Properties of Metals • All of the elements in groups 1-12 are metals (except for hydrogen) • Q: What is a physical property? • A: observable characteristics used to describe or identify something without changing its make up • To be a metal, an a element must have the following properties: • Luster • Ductility • Malleability • Conductivity of thermal energy and electricity

  4. Chemical Properties of Metals • Q: What is a chemical property? • A: the ability or inability of a substance to change into one or more new substances • Chemical properties of metals can be very different…BUT… • Metals in the same group usually have similar chemical properties (ex: gold and other metals in group 11 do not easily react with other substances

  5. After Quiz: In your notebook, answer the following questions. USE FULL SENTENCES AND RE-STATE THE QUESTIONS. • 1. Which of the following metals would be most likely to react similarly with other elements. Tell why you know this. • Elements: calcium, cobalt, potassium, copper, silver • Elements: lithium, titanium, magnesium, potassium • Evaluate the physical properties of potassium, magnesium and copper. Select the best choice to use for a building project. Explain why this metal is the best building material to use.

  6. Q: If all metals share certain characteristics, why are some used for certain jobs instead of others? For example, why is copper used for cookware and wires instead of,say, gold? • Even though they share properties, copper is less expensive than other metals, like gold

  7. Alkalai Metals Group 1 *react quickly with other elements (like oxygen) *so reactive they’re never found uncombined in nature-only in compounds *soft & shiny *lowest densities of all metals

  8. Alkalai Earth Metals Group 2- 2 valence electrons *React quickly with other elements but not as quickly as alkali metals *always in compounds in nature, never in a free state *soft and silvery *low densities but not as low as alkaline earth metals

  9. Transition Metals Groups 3-12 *in two blocks on the table 1. first block is in the center of the table 2. second block includes the two rows at the bottom of table Compared to Groups 1&2 all have: -higher melting points -greater strength Higher densities -reactive less quickly with oxygen -can exist in nature as free elements

  10. Uses of Transition Elements • Main Block: • Good building materials because of: • High densities, strength and resistance to corrosion • Coins – copper, silver, nickel and gold • Jewelry – copper, silver, nickel and gold • Electrical wires • In compounds: • Paints and pigments

  11. Lanthanides and Actinides • Removed from the table so that periods 6&7 would not be longer than the other periods • Uses • Strong magnets (neodymium) • Fuel in nuclear reactors (plutonium)

  12. Patterns in Properties 1. From LEFT to RIGHT – metallic properties DECREASE (so…metals on the right side have NO metallic properties at all) • EX: potassium has the highest luster, is most malleable and conducts electricity better than all the elements in period 4 • 2. Metallic properties tend to INCREASE as you move down a group. • EX: malleability of gold is greater than either silver or copper because it is below these two elements in group 11

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