PES Skill Sheets.book - Capital High School

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Name: Date: 13.2 Chemical Formulas Compounds have unique names that we use to identify them when we study chemical properties and changes. Chemists have devised a shorthand way of representing chemical names that provides important information about the substance. This shorthand representation for a compound’s name is called a chemical formula. You will practice writing chemical formulas in the following activity. What is a chemical formula? Chemical formulas have two important parts: chemical symbols for the elements in the compound and subscripts that tell how many atoms of each element are needed to form the compound. The chemical formula for water, H 2O, tells us that a water molecule is made of the elements hydrogen (H) and oxygen (O) and that it takes two atoms of hydrogen and one atom of oxygen to build the molecule. For sodium nitrate, NaNO 3, the chemical formula tells us there are three elements in the compound: sodium (Na), nitrogen (N), and oxygen (O). To make a molecule of this compound, you need one atom of sodium, one atom of nitrogen, and three atoms of oxygen. How to write chemical formulas How do chemists know how many atoms of each element are needed to build a molecule? For ionic compounds, oxidation numbers are the key. An element’s oxidation number is the number of electrons it will gain or lose in a chemical reaction. We can use the periodic table to find the oxidation number for an element. When we add up the oxidation numbers of the elements in an ionic compound, the sum must be zero. Therefore, we need to find a balance of negative and positive ions in the compound for the molecule to form. Example 1: A compound is formed by the reaction between magnesium and chlorine. What is the chemical formula for this compound? From the periodic table, we find that the oxidation number of magnesium is 2+. Magnesium loses 2 electrons in chemical reactions. The oxidation number for chlorine is 1-. Chlorine tends to gain one electron in a chemical reaction. Remember that the sum of the oxidation numbers of the elements in a molecule will equal zero. This compound requires one atom of magnesium with an oxidation number of 2+ to combine with two atoms of chlorine, each with an oxidation number of 1–, for the sum of the oxidation numbers to be zero. (2 + ) + 2(1 − ) = 0 To write the chemical formula for this compound, first write the chemical symbol for the positive ion (Mg) and then the chemical symbol for the negative ion (Cl). Next, use subscripts to show how many atoms of each element are required to form the molecule. When one atom of an element is required, no subscript is used. Therefore, the correct chemical formula for magnesium chloride is MgCl 2. 13.2
Page 2 of 2 Example 2: Aluminum and bromine combine to form a compound. What is the chemical formula for the compound they form? From the periodic table, we find that the oxidation number for aluminum (Al) is 3+. The oxidation number for bromine (Br) is 1–. In order for the oxidation numbers of this compound to add up to zero, one atom of aluminum must combine with three atoms of bromine: The correct chemical formula for this compound, aluminum bromide, is AlBr 3. Practice writing chemical formulas for ionic compounds Use the periodic table to find the oxidation numbers of each element. Then write the correct chemical formula for the compound formed by the following elements: Element Oxidation Number Potassium (K) Chlorine (Cl) Calcium (Ca) Chlorine (Cl) Sodium (Na) Oxygen (O) Boron (B) Phosphorus (P) Lithium (Li) Sulfur (S) Aluminum (Al) Oxygen (O) Beryllium (Be) Iodine (I) Calcium (Ca) Nitrogen (N) Sodium (Na) Bromine (Br) (3 + ) + 3(1 − ) = 0 Element Oxidation Number Chemical Formula for Compound 13.2
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Chapter and Section Chapter 1: Meas
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Chapter and Section Chapter 5: Forc
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Chapter and Section Chapter 9: Heat
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Chapter and Section Chapter 14: Cha
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Chapter and Section Chapter 18: Ear
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Chapter and Section Chapter 24: Wav
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Name: Date: 1.1 Lab Safety What can
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Page 3 of 6 Safety quiz 1. Draw a d
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Page 5 of 6 c. You suddenly you beg
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Name: Date: 1.1 Using Your Textbook
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Page 2 of 3 The following prefixes
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Name: Date: 1.1 Scientific Notation
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Page 3 of 3 3. Write the numbers in
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Page 2 of 4 Example 1: Measuring ob
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Page 4 of 4 4. . Prefix Symbol Mult
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Name: Date: 1.2 Reading Strategies
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Name: Date: 1.2 Stopwatch Math What
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Name: Date: 1.2 Understanding Light
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Name: Date: 1.2 Indirect Measuremen
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Name: Date: 1.3 Dimensional Analysi
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Name: Date: Skill Builder Fractions
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Page 3 of 4 Solving fraction proble
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Name: Date: 1.3 Significant Digits
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Page 3 of 4 Follow these steps for
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Name: Date: 1.3 Study Notes This sk
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Name: Date: 1.3 Science Vocabulary
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Page 3 of 3 Using the table of pref
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Page 2 of 2 5. Earth’s moon is co
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Page 2 of 3 When precise conversion
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Name: Date: 1.4 Creating Scatterplo
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Page 3 of 3 g. What is the position
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Page 2 of 2 1.4 1. Given the variab
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Page 2 of 3 Step 3: Look at the ran
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Name: Date: 1.4 Recognizing Pattern
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Page 3 of 3 Answer the following qu
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Page 2 of 2 4. Measurements: List a
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Page 2 of 2 2. Your teacher shows y
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Page 2 of 4 Recording valid observa
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Page 4 of 4 b. How did the student
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Page 2 of 3 Name: Lucy O. Date: Jan
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Name: Date: 2.2 Using Computer Spre
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Page 3 of 3 5. The following data i
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Page 2 of 2 2. John notices that hi
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Name: Date: 3.1 Latitude and Longit
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Page 3 of 4 Use an atlas or globe t
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Name: Date: 3.1 Map Scales Mapmaker
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Page 3 of 3 f. Point Q to Point M g
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Page 2 of 5 It’s time to go! 3.1
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Page 4 of 5 37. Now you will head t
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Name: Date: 4.1 Vectors on a Map Yo
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Page 2 of 3 1. Draw a profile map o
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Name: Date: 3.3 Bathymetric Maps Im
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Page 1 of 2 3.3 Tanya Atwater Tanya
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Name: Date: 4.1 Solving Equations w
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Page 3 of 4 Use the formula V = l
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Name: Date: 4.1 Problem Solving Box
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Page 2 of 3 In problems 6 and 7, yo
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Name: Date: 4.1 Percent Error When
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Page 3 of 3 1. The lab group conduc
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Page 2 of 3 1. A bicyclist travels
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Name: Date: 4.1 Velocity Speed and
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Name: Date: 4.2 Calculating Slope f
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Name: Date: 4.2 Analyzing Graphs of
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Page 3 of 4 1. For each position-ti
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Name: Date: 4.2 Analyzing Graphs of
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Name: Date: 4.3 Acceleration Accele
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Name: Date: 4.3 Acceleration and Sp
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Page 3 of 3 3. Graph 3: 4. Find acc
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Page 2 of 3 Example 1: How fast wil
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Name: Date: 5.1 Ratios and Proporti
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Name: Date: 5.1 Internet Research S
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Name: Date: 5.1 Preparing a Bibliog
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Name: Date: 5.1 Mass vs. Weight Wha
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Page 2 of 2 1. A physical science t
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Page 2 of 2 How much does it weigh
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Page 2 of 2 Answer the following pr
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Name: Date: 5.3 Equilibrium When al
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Name: Date: 6.1 Net Force and Newto
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Page 2 of 2 Reading reflection 1. I
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Name: Date: 6.3 Applying Newton’s
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Name: Date: 6.3 Momentum Conservati
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Name: Date: 6.3 Collisions and Cons
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Name: Date: 6.3 Rate of Change of M
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Page 3 of 3 6. A 50.-g (0.050-kg) e
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Page 2 of 2 1. A machine uses an in
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Page 2 of 2 Example 3: A 500-newton
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Page 2 of 2 7. You pull your sled t
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Page 2 of 2 The relationship betwee
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Page 2 of 2 6. Use the gear ratio f
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Page 2 of 2 The three classes of le
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Page 2 of 2 3. Now, calculate the g
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Page 2 of 2 To do this calculation,
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Name: Date: 7.2 Energy Transformati
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Name: Date: 7.2 Conservation of Ene
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Page 2 of 2 Reading reflection 1. W
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Name: Date: 7.3 Power In science, w
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Name: Date: 7.3 Power in Flowing En
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Name: Date: 7.3 Efficiency and Ener
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Page 2 of 2 Reading the temperature
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Page 2 of 4 1. For each of the prob
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Page 4 of 4 1. Surface temperatures
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Page 2 of 2 The graph below shows a
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Name: Date: 9.1 Using the Heat Equa
Page 207 and 208: Name: Date: 10.1 Measuring Mass wit
Page 209 and 210: Page 3 of 3 Reading the balance cor
Page 211 and 212: Page 2 of 2 d. Explain how the disp
Page 213 and 214: Page 2 of 3 Calculating volume of a
Page 215 and 216: Name: Date: 10.1 Density The densit
Page 217 and 218: Name: Date: 10.3 Pressure in Fluids
Page 219 and 220: Name: Date: 10.3 Boyle’s Law The
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Page 223 and 224: Name: Date: 10.4 Archimedes 10.4 Ar
Page 225 and 226: Name: Date: 10.4 Narcís Monturiol
Page 227 and 228: Name: Date: 10.4 Archimedes’ Prin
Page 229 and 230: Name: Date: 11.1 Layers of the Atmo
Page 231 and 232: Page 2 of 2 Reading reflection 1. H
Page 233 and 234: Page 2 of 3 Using temperature data
Page 235 and 236: Page 1 of 2 11.3 Joanne Simpson 11.
Page 237 and 238: Name: Date: 11.3 Weather Maps You h
Page 239 and 240: Name: Date: 11.3 Tracking a Hurrica
Page 241 and 242: Page 3 of 4 Hurricane Andrew crosse
Page 243 and 244: Name: Date: 12.1 Structure of the A
Page 245 and 246: Name: Date: 12.1 Atoms and Isotopes
Page 247 and 248: Name: Date: 12.1 Ernest Rutherford
Page 249 and 250: Name: Date: 12.2 Electrons and Ener
Page 251 and 252: Page 2 of 2 Reading reflection 1. H
Page 253 and 254: Page 2 of 2 Periodic Table Groups T
Page 255 and 256: Page 2 of 2 Using dot diagrams to r
Page 257: Page 2 of 2 13.2 Important note: If
Page 261 and 262: Page 2 of 2 13.2 Predict the name o
Page 263 and 264: Page 2 of 2 Using the information i
Page 265 and 266: Page 2 of 3 Conservation of atoms T
Page 267 and 268: Name: Date: 14.1 The Avogadro Numbe
Page 269 and 270: Page 3 of 4 Substance Elements in s
Page 271 and 272: Name: Date: 14.1 Formula Mass A che
Page 273 and 274: Name: Date: 14.2 Classifying Reacti
Page 275 and 276: Name: Date: 14.2 Predicting Chemica
Page 277 and 278: Name: Date: 14.2 Percent Yield You
Page 279 and 280: Name: Date: 14.4 Lise Meitner Lise
Page 281 and 282: Name: Date: 14.4 Marie and Pierre C
Page 283 and 284: Page 3 of 3 Reading reflection 1. W
Page 285 and 286: Page 2 of 2 Reading reflection 1. R
Page 287 and 288: Page 2 of 2 Reading reflection 1. U
Page 289 and 290: Page 2 of 2 1. The decay series for
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Page 293 and 294: . Page 2 of 3 i. Switches 2, 3, and
Page 295 and 296: Name: Date: 16.1 Benjamin Franklin
Page 297 and 298: Name: Date: 16.2 Using an Electric
Page 299 and 300: Page 3 of 4 Build a series circuit
Page 301 and 302: Name: Date: 16.3 Voltage, Current,
Page 303 and 304: Page 3 of 3 Now you will have the o
Page 305 and 306: Page 2 of 2 7. How much voltage wou
Page 307 and 308: Page 2 of 2 5. Use the series circu
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Page 2 of 2 In part (d) of problems
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Page 2 of 2 Reading reflection 1. N
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Page 2 of 2 Reading reflection 1. H
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Page 2 of 2 7. The directions—nor
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Page 2 of 2 6. Repeat step 5 to for
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Page 2 of 2 A transformer steps dow
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Page 2 of 2 4. Calculate the power
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Page 2 of 4 Determining the relativ
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Page 4 of 4 Extension—Creating cl
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Page 2 of 2 Reading reflection 1. N
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Name: Date: 19.1 Earth’s Interior
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Page 2 of 2 Reading reflection 1. L
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Page 2 of 2 Reading reflection 1. E
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Name: Date: 19.4 Continental United
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Page 3 of 4 When a mountain is form
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Name: Date: 20.1 Averaging The most
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Page 2 of 5 Locating the epicenter
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Page 4 of 5 20.1 For each of the pr
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Name: Date: 20.2 Volcano Parts 20.2
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Name: Date: 21.2 Calculating Concen
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Name: Date: 21.2 Solubility In this
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Page 3 of 3 The influence of temper
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Page 2 of 3 Work through these exam
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Name: Date: 21.3 Calculating pH The
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Name: Date: 22.1 Groundwater and We
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Page 3 of 3 Testing the model: 1. W
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Name: Date: 24.1 Period and Frequen
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Page 2 of 2 2. Use the grids below
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Page 2 of 2 2. Use the grids below
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Page 2 of 3 x-axis (blocks) Height
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Name: Date: 24.3 Decibel Scale The
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Page 2 of 2 a. ____________________
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Page 2 of 2 2. Two students want to
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Name: Date: 24.3 Palm Pipes Project
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Page 3 of 3 6. Challenge: You can f
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Page 2 of 2 Answer the following pr
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Page 2 of 2 4. You see a chair that
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Page 2 of 2 a. ____________________
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Name: Date: 25.3 Using Ray Diagrams
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Page 2 of 2 2. Light strikes a mirr
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Page 2 of 2 Which way does the ligh
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Page 2 of 2 25.3 1. A lens has a fo
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Name: Date: 26.1 Gravity Problems I
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Name: Date: 26.1 Universal Gravitat
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Page 1 of 2 26.1 Nicolaus Copernicu
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Page 1 of 2 26.1 Galileo Galilei Ga
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Page 1 of 2 26.1 Johannes Kepler 26
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Name: Date: 26.1 Measuring the Moon
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Page 3 of 3 Semi-Circle Card: 26.1
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Page 2 of 2 Reading reflection 1. B
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Page 2 of 2 Part 2: Provisions for
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Page 1 of 2 27.1 Arthur Walker 27.1
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Name: Date: 27.2 The Inverse Square
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Page 2 of 3 1. Fill in the missing
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Name: Date: 28.1 Understanding Ligh
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Name: Date: 28.1 Parsecs You have a
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Page 1 of 2 28.1 Edwin Hubble Edwin
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Name: Date: 28.2 Light Intensity Pr
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Page 2 of 2 If we know the brightne
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Page 2 of 2 Solving Doppler Shift P
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13. A decimeter is 100 times larger
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Skill Sheet 1.3: Significant Digits
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7. Yes, there is a relationship bet
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6. The slope is the same (2.0) unti
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13. S Sh—Sand and shells on the b
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10. 410 miles 11. 6.6 miles -------
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Skill Sheet 4.2: Analyzing Graphs o
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Skill Sheet 5.1: Mass, Weight, and
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Skill Sheet 6.3: Applying Newton’
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Skill Sheet 7.1: Mechanical Advanta
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8. The middle gear turns left. The
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Skill Sheet 7.3: Power in Flowing E
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Skill Sheet 10.1: Calculating volum
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3. Answers are: a. 100 cm 3 b. 13 N
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Skill Sheet 11.3: Weather Maps Samp
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a. b. c. d. e f. Skill Sheet 12.2:
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Skill Sheet 14.1: Chemical Equation
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must be blocking their insulin’s
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8. The current is approximately the
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7. Students can find information ab
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Skill Sheet 17.4: Electrical Power
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Skill Sheet 19.1: Charles Richter 1
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Practice 2: 1. First problem is don
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Skill Sheet 21.3: Calculating pH 1.
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Question 8 (con’t) 9. The new wav
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Skill Sheet 25.2: The Human Eye a.
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Skill Sheet 26.1: Nicolaus Copernic
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Skill Sheet 27.1: Arthur Walker 1.
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