Atoms and Bonding Unit 2 Practice Test Form C

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1 NAME Hour Atoms and Bonding Unit 2 Practice Test Form C Objective 1: Use the atomic number and mass number of an element to find the number of protons, electrons, and neutrons. Directions: Complete the table for the following elements: Element Symbol of Protons of Electrons of Neutrons Lithium 4 Atomic Mass Pd 105 Score: /13 (1/2 pt each) 1

2 Objective 2: Draw simple Bohr models of isotopes. Write the standard notation for any isotope. Calculate the average atomic mass of an element from isotope data. Carbon has 2 natural isotopes. The first isotope has a mass of amu and has a percent abundance of The second isotope has a mass of amu and has a percent abundance of Draw a simple Bohr model of both isotopes in the boxes below: First Isotope Second Isotope 2. Write the standard notation both isotopes below: First Isotope Second Isotope 3. Calculate the average atomic mass of an element from its isotope data. Show all work and circle final answer. Be sure to include units with your final answer! Score: /11 2

3 Objective 3: Identify the position of groups, periods, representative elements, transition elements, inner transition elements, metals, metalloids, and nonmetals on the periodic table. Directions: Complete the table for the following elements: Element Symbol Group Period Co Representative or Transition? Metal, metalloid, nonmetal? Silicon 7B 5 7A 5 Al Score: /12 Objective 4: Distinguish between ionic and molecular compounds. Directions: Label the following compounds as either ionic or molecular. 1. Cobalt II Chloride 2. Chromium III Fluoride 3. H 2 O 4. NO 3 5. CF 2 Score : /10 3

4 Objective 5 Apply the rules for naming and writing formulas for binary ionic compounds. Directions: Hook together the following ions to write the correct formula AND place the name of the resulting compound within the box. Boride ion Cesium ion Manganese (II) Ion Zirconium (IV) ion Bromide Ion Score: 12 Objective 6 - Apply the rules for naming and writing formulas for ternary ionic compounds. Directions: Hook together the following ions to write the correct formula AND place the name of the resulting compound within the box. Sr +2 Sn +4 NH 4 +1 C2H3O2-1 SiO3-2 PO 3-3 Score: /18 4

5 Objective 7 Apply the rules for naming binary molecular compounds. Directions: Name the following binary molecular compounds: 1. Cl 3 I 8 2. N 4 Cl 3. B6I 2 Score: /6 Objective 8 Apply the rules for writing formulas for binary molecular compounds. Directions: Write formulas for the following binary molecular compounds. 1. pentaphosphorus decasulfide 2. hexabromine nonaoxide 3. nonasulfur decafluoride Score: /6 Objective 9 Apply the rules for naming and writing formulas for acids. Directions: Hook together the Hydrogen Ion to the following negative ions and write the correct formulas AND name the resulting acid. Cr 2 O7-2 H +1 B -5 ClO2-1 Score: /6 5

6 Objective 10 Write names of any compound when given its formula. Directions: Write the names of the following compounds in the blank provided. 1. HClO2 2. CuBr2 3. S2Br5 4. Li3CO3 5. HBr Score: /15 Objective 11 Write a formula for any compound when given its name. Directions: Write the correct formula for the following compounds. 1. ammonium oxalate 2. hydroiodic acid 3. cobalt (II) bromide 4. triphosphorus pentafluoride 5. cobalt (II) cyanide Score: /15 6

7 Objective 12 Distributed Practice 1. For each process described below, indicate if it is a physical change or a chemical change. (2 pts each) a. Combining two solutions and forming a solid b. Burning a wood splint c. Filtering sand from beach water d. Placing magnesium ribbon into water 2. Classify each form of matter as an element, compound, homogeneous mixture, or a heterogeneous mixture. (2 pts each) a. Rock b. cobalt II chloride c. Gatorade d. sodium 3. Identify one physical property and one chemical property for the following substance: (4 pts) Aluminum foil Physical Property Chemical Property /12 7

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