Work hard. Be nice. Name: Period: Date: UNIT 2: Atomic Concepts Lesson 1: Give me an element, any element

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2 Name: Period: Date: KIPP NYC College Prep General Chemistry UNIT 2: Atomic Concepts Lesson 1: Give me an element, any element Do Now: By the end of today, you will have an answer to: How do you know the properties of an element by its location on the periodic table? 1. Classify each as a physical change (PC) or a chemical change (CC) H 2O kJ H 2O (l) 2 H 2(g) + O 2 (g) 2 H 2O (g) kj H 2 (g) + I 2 (g) kj 2 HI(g) N 2(g) + 2O 2 (g) kj 2 NO 2 (g) 2. On the powerpoint slide in front of you, there is a picture of three samples of different elements. Write down three adjectives you could use to describe all three samples. CATALYST ACTIVITY! In your pairs, look at the object in front of you and answer the following question based on your object. OBJECT: 1. What are at least two adjectives you could use to describe the object in front of you? 2. Do you think your object will get hot quickly if put over a flame? Explain your reasoning. 3. Would it be easy to take your object and make other things out of it like tools, pots, cups, etc? Explain your reasoning. 4. Describe two ways that your object is different from another object that your classmates have. CLASSMATE S OBJECT:

3 BASIC TERMINOLOGY Groups and Periods: Term Definition How many are there are on the periodic table? Group A column of the periodic table Period A row of the periodic table Example: Which member of group 13 is found in the second period? (1) Be (2) Mg (3) B (4) Al PROPERTIES AND ORGANIZATION: The periodic table is organized properties An element is where it is on the periodic table depending on its characteristics o Elements with similar properties occupy the same general area of the periodic table Regions of the Periodic Table Metals and Nonmetals 1 H He Li 3 Na Be 4 Mg B 5 Al 2 C N O F Ne Nonmetals Si P S Cl Ar K 19 Rb 37 Cs 12 Ca 20 Sr 38 Ba Sc 21 Y 39 Ti V Cr Mn Fe Co Ni Cu Zn Zr Nb Mo Tc Ru Rh Pd Ag Cd METALS Hf Ta W Re Os Ir Pt Au Hg 13 Ga 31 In 49 Tl 14 Ge 32 Sn 50 Pb 15 As 33 Sb 51 Bi 16 Se 34 Te 52 Po 17 Br 35 I 53 At 18 Kr 36 Xe 54 Rn 7 55 Fr Ra Rf Db Sg Bh Hs Mt Metalloids La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu 57 Ac 58 Th 59 Pa 60 U 61 Np Pu Am Cm 65 Bk 66 Cf 67 Es 68 Fm 69 Md 70 No 71 Lr Type of Element Properties Metal Non-Metal Metalloid 1. Most of the elements in the Periodic Table are classified as (1) Metalloids (3) Nonmetals (2) Noble gases (4) Metals 2. Phosphorus is best classified as a (1) Nonmetal (3) Metalloid (2) Metal (4) Transition element

4 Name: Pd: Date: KIPP NYC College Prep General Chemistry WORK 2.1- Organization of the Periodic Table 10 points Part I: Independent Work Summary: How can we use the periodic table to determine if an element is a metal, metalloid or non-metal? Then describe two different properties of each: Directions: For each element, write down their location on the periodic table by group and period and then classify them as metal, metalloid, or non-metal. Element Group Period Metal, metalloid, nonmetal Silicon Selenium Na Barium I Partner Work: Directions: A student conduct a series of tests to determine the properties of 8 unknown elements labeled a-h. The student fills out the following data table. Based on data collected, determine whether each element is a metal, metalloid, or a non-metal. Element Malleable or Brittle? Conducts? Shiny or Dull? Color or other characteristics? a Brittle Yes Dull Dark gray b Malleable Yes Sort of shiny Sort of silver c Brittle Yes Dull or shiny Dark color d Malleable Yes Shiny Silvery e Brittle No Dull Yellow f Malleable Yes Dull or shiny Gray g Malleable Yes Shiny Silvery h Brittle No Dull Black/ Purple Metal, Nonmetal OR metalloid? 1. Based on the data above, what procedure do you think the student did to figure out whether the element was brittle or malleable?

5 Regents Directions: Answer all questions based on your knowledge of chemistry. 1. Which list of elements contains a metal, a metalloid, and a nonmetal? (1) Zn, Ga, Ge (3) Si, Ge, Sn (2) Cd, Sb, I (4) F, Cl, Br 2. Which element is malleable and conducts electricity? (1) Iron (3) Iodine (2) Sulfur (4) Phosphorous 3. Elements on the modern periodic table are arranged in order of increasing (1) Atomic mass (2) Atomic number (3) Number of neutrons (4) Number of valence electrons 4. Which element has both metallic and nonmetallic properties? (1) Rb (3) Rn (2) Si (4) Sr 5. Which element is a solid at STP and a good conductor of electricity? (1) Iodine (3) Mercury (2) Nickel (4) Sulfur 6. Which element is classified as a non-metal? (1) Be (3) Al (2) Si (4) Cl 7. Which element is a metal that is in the liquid phase at STP? (1) Bromine (2) Cobalt (3) Hydrogen (4) Mercury 8. Which list of elements consists of a metal, a metalloid, and a nonmetal? (1) Li, Na, Rb (3) Sn, Si, C (2) Cr, Mo, W (4) O, S, Te 9. Describe one appropriate laboratory test that can be used to determine the malleability of a solid sample of an element at room temperature. 10. Base your answer to this question on the information below. Two sources of copper are cuprite, which has the IUPAC name copper(i) oxide, and malachite, which has the formula Cu 2CO 3(OH) 2. Copper is used in home wiring and electric motors because it has good electrical conductivity. Other uses of copper not related to its electrical conductivity include coins, plumbing, roofing, and cooking pans. Aluminum is also used for cooking pans. At room temperature, the electrical conductivity of a copper wire is 1.6 times greater than an aluminum wire with the same length and cross-sectional area. At room temperature, the heat conductivity of copper is 1.8 times greater than the heat conductivity of aluminum. At STP, the density of copper is 3.3 times greater than the density of aluminum. Identify one physical property of copper that makes it a good choice for uses that are not related to electrical conductivity. 11. Base your answer to this question on the information below. Identify one element from this table for each type of element: metal, metalloid, and nonmetal. Metal: Metalloid: Non-metal: ADD THE FOLLOWING WORDS TO YOUR GLOSSARY SHEET: - Metal - Group - Nonmetal - Period - Metalloid