Use the periodic table and the information that follows to write the hyphen notation for each isotope described. a. atomic number = 2, mass number = 4 b. atomic number = 8, mass number = 16 c. atomic number = 19, mass number = 39

Match the definition in Column B with the word in Column A. Write the letter of the correct definition on the answer line.

Column A

ubiquitous __________________

Column B

a. a departure from the normal or common order, form, or rule

b. deviating from what is normal; atypical

c. conspicuously unconventional; strikingly foreign

d. not consistent with what is logical, customary, or expected; not corresponding

e. being or seeming to be everywhere at the same time

f. odd, peculiar, or whimsical behavior

g. concerned with the ordinary, practical, or usual

h. prevalent in or peculiar to a particular locality or people; native

i. not habitual, customary, or common

j. a model of perfection or excellence

a. If A has three elements and B has two elements, what is the greatest number of elements possible in (i) $A\cup B$? (ii) $A\cap B$? (iii) B - A? (iv) A - B?
b. If A has n elements and B has m elements, what is the greatest number of elements possible in (i) $A\cup B$? (ii) $A\cap B$? (iii) B - A? (iv) A - B?

Zillow.com is a real estate Web site that provides free estimates of the market value of homes. A trio of University of Texas at San Antonio professors compared Zillow estimates to actual sale prices of homes and published their results in The Appraisal Journal (Winter 2010). The analysis was based on data collected for 2,045 single-family residential properties in Arlington, Texas, that sold during a recent year. Sale price and Zillow estimated value (in dollars) were measured for each property. Zillow claims that this market has one of its highest accuracy ratings. However, the research revealed that Zillow overestimated the market value by more than 10% for nearly half of the properties. a. What is the experimental unit for this study? b. Describe the variables measured in the study. Do these variables produce quantitative or qualitative data? c. Give a scenario where the 2,045 properties represent a population. d. If the 2,045 properties represent a representative sample from a population, describe the population. e. Suppose the relevant population is all single-family residential properties in the United States. Do you believe the 2,045 properties are representative of this population? Explain.

Use dimensional analysis to show that the electric power output of a wind turbine is proportional to the cube of the wind speed. The relevant quantities on which the power can depend are the length L of the rotor blades, the density

$$\rho$$

of air (SI units

$$kg/m^3$$

), and the wind speed v.

Using the periodic table, determine the following.

a. The atomic number of the element carbon b. The atomic mass of the element silicon c. The atomic number of the element with an atomic mass of 88.91 amu d. The atomic mass of the element located in Period 2 and Group IIA

Without referring to tables or figures in the text other than the periodic table, indicate which of the following atoms, $\mathrm{Bi}, \mathrm{S}, \mathrm{Ba}, \mathrm{As}$, or $\mathrm{Mg}$, has the intermediate value when they are arranged in order of increasing electronegativity.

Using the average atomic masses for each of the following elements (see the table inside the front cover of this book), calculate the number of atoms present in each of the following samples.

d. 6345 amu of iodine

Liquid propane is burned with dry air. A volumetric analysis of the products of combustion yields the following volume percent composition on a dry basis: 8.6% CO2, 0.6% CO, 7.2% O2, and 83.6% N2. Determine the percentage of theoretical air used in this combustion process.

Hold a Small-Group Discussion. In a small group, research and discuss the benefits of the free economic system, particularly the creation of wealth and how stocks and bonds are part of this system. Be sure to explain the difference between stacks and bonds and describe why businesses sell stocks and bonds. Then describe how investing in these financial instruments helps investors build wealth. Use what you have learned in this chapter as a guide to research and prepare for the discussion. Take turns identifying how the free enterprise system supports the creation of wealth and support your statements with specific examples and logical reasoning.

Match the definition in Column B with the word in Column A. Write the letter of the correct definition on the answer line.

Column A

paragon __________________

Column B

a. a departure from the normal or common order, form, or rule

b. deviating from what is normal; atypical

c. conspicuously unconventional; strikingly foreign

d. not consistent with what is logical, customary, or expected; not corresponding

e. being or seeming to be everywhere at the same time

f. odd, peculiar, or whimsical behavior

g. concerned with the ordinary, practical, or usual

h. prevalent in or peculiar to a particular locality or people; native

i. not habitual, customary, or common

j. a model of perfection or excellence

A certain element, M, is a main-group metal that reacts with chlorine to give a compound with the chemical formula MCI2 and with oxygen to give the compound MO. (a) To which group in the periodic table does element M belong? (b) The chloride contains 44.7% chlorine by mass. Name the element M.

Use the periodic table to give the symbol of the element that meets the following conditions: a. has five electrons in the $n=3$ energy level b. has one electron in the $6 p$ sublevel c. completes the $7 s$ sublevel d. has four $5 p$ electrons

Combine items from each column in order to write eight logical sentences. Remember that a + el = al.

$$\begin{matrix} \text{yo} & \quad & \text{la clase }\\ \text{tú} & \quad & \text{la oficina}\\ \text{Ud.} & \quad & \text{el parque}\\ \text{Felipe} & \text{ir + a} & \text{el restaurante}\\ \text{Elena} & \quad & \text{la fiesta}\\ \text{nosotros} & \quad & \text{la escuela}\\ \text{los estudiantes} & \quad & \text{el banco}\\ \text{los profesores} & \quad & \text{el hotel}\\ \end{matrix}$$