By Carl Lyman © September 2001 Jeopardy Template By Carl Lyman © September 2001

Midterm Jeopardy 1 Tools Matter Atomic Naming 100 200 300 400 500

Credits That’s all folks. Exit

Tools $100 A.) 40.3 mL B.) 43 mL C.) 43.0 mL D.) 43.00 mL

Tools $100 C 43.0 mL Scale is 1 mL and the measurement rule states that you must estimate one digit beyond the scale

Write in scientific notation: Tools $200 Write in scientific notation: 36,400 A.) 36.4 x 104 B.) 3.64 x 104 C.) 36.4 x 103 D.) 3.64 x 10-4

Tools $200 B 3.64 x 104 Number in front must be between1 and 10. Decimal is moved 4 places and the exponent is positive because the original number is greater than 1.

How many significant figures are in the measurement 0.0034 kg? Tools $300 How many significant figures are in the measurement 0.0034 kg? A.) 1 B.) 2 C.) 4 D.) 5

Tools $300 B 2 Decimal point absent so come from pacific side. Start counting at the first non zero 0.0034 →

Tools $400 Express the sum of 7.68 m + 5.0 m using the correct number of significant digits. A.) 12.68 m B.) 12.7 m C.) 13 m D.) 10 m

Tools $400 B 12.7 m When adding and subtracting you look at the decimal position. The number should be expressed to the tenth position. It is rounded to 12.7 because of the 8 in the hundredth position for 12.68

Tools $500 Express the product of 2.2 mm x 5.00 mm using the correct number of significant digits. A.) 10 mm B.) 11 mm C.) 11.0 mm D.) 11.00 mm

Tools $500 B 11 When multiplying or dividing you look at significant digits. Your answer should include 2 significant digits

Which of the following is a physical change? Matter $100 Which of the following is a physical change? A.) corrosion B.) explosion C.) evaporation D.) rotting of food

Matter $100 C Evaporation Phase changes are physical changes. The composition of the material is not changed, just the distance between the particles

What is one difference between a mixture and a compound? Matter $200 What is one difference between a mixture and a compound? A.) A compound consists of more than one phase. B.) A compound can only be separated into its components by chemical means. C.) A mixture can only be separated into its components by chemical means. D.) A mixture must be uniform in composition.

Matter $200 B A compound can only be separated into its components by chemical means. Compounds consist of two or more elements chemically combined in a fixed ratio and thus can only be separated by chemical means. A mixture is a blend of two substances not chemically combined and can be separated by physical means

Which of the following is a heterogeneous mixture? Matter $300 Which of the following is a heterogeneous mixture? A.) air B.) salt water C.) steel D.) soil

Matter $300 D Soil Heterogeneous mixtures contain identifiably different components. It does not look of uniform composition

D.) Heterogeneous Mixture Matter $400 Which of the following cannot be broken down by chemical or physical means? A.) Element B.) Compound C.) Homogenous Mixture D.) Heterogeneous Mixture

Matter $400 A Element Elements are made of only one type of atom and cannot be separated by chemical means, compounds can. Mixtures can be broken down by physical means

Which of these elements is not diatomic as a free element? Matter $500 Which of these elements is not diatomic as a free element? A.) nitrogen B.) hydrogen C.) boron D.) chlorine

Matter $500 C Boron The 7 diatomic elements are: HONClBrIF

Atomic $100 In Rutherford's gold foil experiments, some alpha particles were deflected from their original paths but most passed through the foil with no deflection. Which statement about gold atoms is supported by these experimental observations? A.) Gold atoms consist mostly of empty space B.) Gold atoms are similar to alpha particles C.) Alpha particles and gold nuclei have opposite charges D.) Alpha particles are more dense than gold atoms

Atomic $100 A Gold atoms consist mostly of empty space Most particles passed through because they did not hit anything

Atomic $200 The region labeled "Y" in the diagram has a charge that is: A.) positive B.) negative C.) neutral

Atomic $200 A Positive Y is the nucleus that contains positive protons and neutral neutrons. X is the negatively charged electron cloud

Atomic $300 Most of the mass of the atom can be found in the: A.) charges B.) electron cloud C.) electrons D.) nucleus

Atomic $300 D Nucleus The nucleus contains protons and neutrons, both with masses of 1 amu. The electron has a mass of 1/1836, so the electron cloud has very little mass in its large volume.

Atomic $400 Which atoms are isotopes of the same element? D.) d C.) c A.) a B.) b

Atomic $400 1 Isotopes have the same number of protons (bottom left), but a different number of neutrons (found by subtracting the protons from the mass number in upper left). Both have 12 protons, but one isotope has 12 neutrons and the other one has 13.

Atomic $500 How many electrons are contained in an Au+3 ion? A.) 76 B.) 79 C.) 82 D.) 197 Also determine the number of protons and neutrons

Atomic $500 A 76 Protons are equal to the atomic number: 79 Neutrons are mass (197) – protons (79): 118 Negative electrons are equal to positive protons in a neutral atom. This atom has a charge of +3, three too little electrons. 79 – 3 = 76

What is the formula for triphosphorus pentasulfide? Naming $100 What is the formula for triphosphorus pentasulfide? A.) P5S3 B.) P6S3 C.) P3S5 D.) S4P5 E.) PS3

Naming $100 C P3S5 Prefixes tell you how many atoms are present. Tri- is 3 and Penta- is 5. The number is placed as a subscript to the right of the element symbol

What is the formula for barium hydroxide? Naming $200 What is the formula for barium hydroxide? A.) BaOH B.) BaOH2 C.) Ba(OH)2 D.) Ba(OH)

Naming $200 C Ba(OH)2 You must assign charges: Ba = +2 and OH = -1. The charges are crisscrossed: one Ba and 2 OH. Parentheses are needed because there are 2 OH’s (2 O’s and 2 H’s).

What is the name of the compound Li2CO3? Naming $300 What is the name of the compound Li2CO3? A.) dilithium carbonate B.) dilithium hydrogen carbonate C.) lithium(I) carbonate D.) lithium carbonite E.) lithium carbonate

Naming $300 E lithium carbonate Compounds with 3 or more elements contain a polyatomic ion. It is not a binary compound with 2 nonmetals so prefixes are not used.

What is the formula for tin(IV) chromate? Naming $400 What is the formula for tin(IV) chromate? A.) Sn(CrO4)4 B.) Sn2(CrO4)2 C.) Sn2(CrO4)4 D.) Sn(CrO4)2

Naming $400 D Sn(CrO4)2 The roman numeral represents the charge on the metal. Assign charges Sn = 4 and CrO4 = -2. Crisscross the charges: two Sn and 4 CrO4. Subscripts must be reduced to lowest whole number ratio. 2:4 becomes 1:2.

Naming $500 Name the compound CuCO3. A.) copper carbonate B.) copper (I) carbonate C.) copper(II) carbonate D.) copper(III) carbonate

Naming $500 C copper (II) carbonate Compounds with 3 or more elements contain a polyatomic ion. Copper is a transitions metal and needs a roman numeral to describe its charge. It is +2 because the one copper needs to cancel out the -2 charge on the one carbonate