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Can you think of any characteristics that the metals have in common? Do any of the metals have similar uses?

Bellringer/4.3 Notes (2-16-11). The elements below are classified as metals. You may be familiar with some of these elements . If you know of a specific use for an element listed below, write it next to the element's name. If you can’t think of any use, leave them blank . Silver, Ag

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Can you think of any characteristics that the metals have in common? Do any of the metals have similar uses?

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  1. Bellringer/4.3 Notes (2-16-11) • The elements below are classified as metals. You may be familiar with some of these elements. If you know of a specific use for an element listed below, write it next to the element's name. If you can’t think of any use, leave them blank. • Silver, Ag • Gold, Au • Tin, Sn • Copper, Cu • Lead, Pb • Mercury, Hg • Aluminum, Al • Platinum, Pt 2. The elements below are classified as nonmetals. You may be familiar with some of these elements. If you know of a specific use for an element listed below, write it next to the element's name. You may leave some of them blank. A. Helium, He B. Chlorine, Cl C. Oxygen, O D. Iodine, I E. Neon, Ne F. Carbon, C Can you think of any characteristics that the metals have in common? Do any of the metals have similar uses? 4. Look at the periodic table and notice where each of the elements listed above is located. Where are the metals located? Where are the nonmetals located?

  2. I. How are elements classified? Elements are classified into three groups: Metals 2. Nonmetals 3. Semiconductors II. Metals Alkali metals – Group 1 1. Soft, shiny, react violently with water, not found naturally in nature (found in a compound) 2. Form ions with +1 charge

  3. B. Alkaline-earth metals – Group 2 1. Form ions with +2 charge C. Transition metals Can form positive ions of varying charges 2. Conducts electricity

  4. III. Nonmetals A. Mostly found on the right side of the periodic table – Hydrogen is a nonmetal on the left B. Halogens – group 17 Form ions with -1 charge C. Noble Gases – group 18 Exist as single atoms in nature – the outer energy level is ALWAYS full D. Metalloids (Semiconductors) Boron, silicon, germanium, arsenic, antimony, tellurium

  5. Bellringer/Notes 4.4 Sometimes when you are dealing with numbers of things, it is convenient to have a special unit that designates a specific number of the objects. Below are examples of special units that are used to count objects. Fill in the correct number of objects in each example. 2. What if you want to use six sticks of butter, but you only have a large block of butter and a scale? How could you get the equivalent of six sticks of butter without the mess of dividing the large block into sticks?

  6. I. Counting Things When counting atoms, we use a special unit – the ‘mole’ (mol) A mole is a collection of very large numbers of particles 2. 1 mole = 602,213,670,000,000,000,000,000 6.02 x 1023 b. For example, 1 mol of basketballs would be 6.02 x 1023 basketballs B. The molar mass of an element is = to its average atomic mass C. For carbon: 1 mol 12.01 (carbon’s atomic mass)

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