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Semester Exam Review

Please make your selectionThe study of matter and the changes in

matter best describes the science of

A) BiologyB) PhysicsC) MicrobiologyD) Chemistry

Please make your selectionChemistry is

A) a biological science.B) a physical science.C) concerned mostly with living things.D) the study of electricity.

Please make your selectionHow many valence electrons are in an atom of magnesium?

A) 4B) 2C) 3D) 5

Please make your selectionThe branch of chemistry that includes the

study of materials and processes that occur in living things is

A. Organic chemistryB. Physical chemistryC. Analytical chemistryD. Biochemistry

Please make your selectionThe study of substances containing carbon

is A) Organic chemistryB) Inorganic chemistryC) Analytical chemistryD) Biochemistry

Please make your selectionTechnology is

A) Analysis of chemical behaviorB) Application of chemical principles to

predict eventsC) Application of scientific knowledge to

solve problemsD) Study of scientific processes

Please make your selectionWhat is the formula of the ion formed when potassium achieves noble-gas electron configuration?

A) K+

B) K-

C) K2+

D) K2-

Please make your selectionBasic research is

A) Carried out for the sake of increasing knowledge

B) The production and use of products that improve our life.

C) The identification of the components and composition of materials

D) Carried out to solve a problem

Please make your selectionWhich of the following is a heterogeneous mixture?

A) soilB) airC) steelD) salt water

Please make your selectionMatter includes all of the following except

A) SmokeB) Water vaporC) LightD) Air

Please make your selectionChemical properties

A) Include changes of state of a substanceB) Include mass and colorC) Include changes that alter the identity of a

substanceD) Can be observed without altering the

identity of a substance

Please make your selectionTwo features that distinguish matter are

A) Mass and velocityB) Weight and velocityC) Mass and volumeD) Weight and volume

Please make your selectionWho was the man who lived from 460 B.C.–370 B.C. and was among the first to suggest the idea of atoms?

A AtomosB DemocritusC ThomsonD Dalton

Please make your selectionA horizontal row of the periodic table is usually referred to as a

A family.B period.C group.D property.

Please make your selectionWhat does the number 84 in the name krypton-84 represent?

A the mass numberB the atomic numberC twice the number of protonsD the sum of the protons and electrons

Please make your selectionIn a chemical reaction, the type of products obtained is largely determined by which part of the reacting chemicals?

A protonsB neutronsC nucleiD electrons

Please make your selectionThe sum of the protons and neutrons in an atom equals the ____.

A atomic massB mass numberC atomic numberD nucleus number

Please make your selectionWhich of the following changes to a metal is a chemical change?

A meltingB polishingC bendingD rusting

Please make your selectionThe smallest particle of an element that retains the properties of that element is a(n) ____.

A protonB atomC electronD neutron

Please make your selectionWhat is the net charge of the ionic compound calcium fluoride?

A 0B 1C 1–D 2–

Please make your selectionWhich of the following elements has the smallest first ionization energy?

A potassiumB magnesiumC sodiumD calcium

Please make your selectionThe modern periodic table is arranged in order of increasing atomic ____.

A radiusB massC numberD charge

Please make your selectionWhich of the following is a chemical property?

A ability to react with oxygen

B colorC freezing pointD hardness

Please make your selectionThe first letter in a properly written chemical symbol is always

A underlined.B capitalized.C italicized.D bold faced.

Please make your selectionWhat element has the electron configuration 1s22s22p63s23p2?

A silver B selenium C nitrogen D silicon

Please make your selection When paper turns yellow-brown upon

exposure to sunlight, what type of change is likely taking place?

A neither a physical change nor a chemical change

B a physical change C both a physical change and a

chemical change D a chemical change

Please make your selectionThe letter "p" in the symbol 4p indicates the ____.

A orbital shapeB principle energy levelC speed of an electronD spin of an electron

Please make your selectionWhat type of ions have names ending in -ide?

A only cationsB only metal ionsC only anionsD only gaseous ions

Please make your selectionWhich of the following elements has the smallest ionic radius?

A LiB OC KD S

Please make your selectionWhich of the following measurements contains two significant figures?

A 0.004 40 LB 0.004 04 LC 0.004 00 LD 0.000 44 L

Please make your selectionWhich of the following elements forms an ion with a 1– charge?

A sodiumB fluorineC hydrogenD potassium

Please make your selectionWhich state of matter has a definite volume and takes the shape of its container?

A solid B liquid onlyC gas onlyD both b and c

Please make your selectionWhat is the charge on the strontium ion?

A 2+

B 1+

C 1–D 2–

Please make your selectionWhat is the element with the highest electronegativity value?

A fluorineB calciumC cesiumD helium

Please make your selectionHow many significant figures are in the measurement 811.40 grams?

A twoB fiveC fourD three

Please make your selectionIsotopes of the same element have different

A chemical behavior.B positions on the periodic table.

C mass numbers.D atomic numbers.

Please make your selectionExpress the sum of 7.68 m and 5.0 m using the correct number of significant digits.

A 13 mB 12.68 mC 12.7 mD 10 m

Please make your selectionWhich of the following is a cation?

A Ca2+

B SO32-

C sulfateD chlorite

Please make your selectionWhich state of matter takes both the shape and volume of its container?

A solidB liquid onlyC gas onlyD both b and c

Please make your selectionHow many electrons can occupy the s

orbital at each energy level?

a. Two, if they have opposite spinsb. Two, if they have the same spinc. Oned. No more than eight

Please make your selection How many protons, electrons, and

neutrons does an atom with atomic number 50 and mass number 125 contain?

A. 50 protons, 50 electrons, 75 neutrons

B . 70 neutrons, 75 protons, 50 electrons

C. 120 neutrons, 50 protons, 75 electrons

D. 75 electrons, 50 protons, 50 neutrons

Please make your selectionDivide 5.7 m by 2 m. The quotient is

correctly reported as

a. 2.8 mb. 2.85 mc. 2.9 md. 3 m

Please make your selectionThe graph of a direct proportion is a(n)

a. Straight lineb. Ellipsec. Parabolad. Hyperbola

Please make your selectionArgon, krypton, and xenon are

a. Alkaline earth metalsb. Noble gasesc. Actinidesd. Lanthanides

Please make your selectionMendeleev is credited with developing the

first successful

a. Periodic tableb. Method of determining atomic numberc. Test for radioactivityd. Use of x-rays

Please make your selectionWhich of the following shows a

physical change occurring? a. A peach spoils. b. A copper bowl tarnishes. c. A piece of jewelry turns your skin green.

d. A hot-glue gun melts a glue stick.

Please make your selectionWhich element listed is considered to be

unreactive (inert) based on its location on the periodic table?

a. Cab. Pc. Sid. Ar

Please make your selection Which of the following observations

does not indicate that a chemicalchange has occurred? a. change of state b. formation of a precipitate c. absorption of energy d. release of a gas

Please make your selectionWhat is the atomic number of aluminum?

a. 13b. 14c. 26.98d. 26.9815

Please make your selectionA neutral atom of selenium contains

a. 34 electronsb. 78.96 electronsc. 45 electronsd. 79 electrons

Please make your selectionThe most useful source of chemical

information about the elements is a a. Calculatorb. Table of metric equivalentsc. Periodic tabled. Table of isotopes

Please make your selectionElements in a group in the periodic table can

be expected to have similara. Atomic massesb. Atomic numbersc. Number of neutronsd. properties

Please make your selectionA vertical column of blocks in the periodic

table is called a(n)

a. Periodb. Groupc. Propertyd. Octet

Please make your selectionThe elements that border the zigzag line in

the periodic table are

a. Inactiveb. Metalsc. Metalloidsd. nonmetals

Please make your selectionWhich of the following is quantitative?

a. The liquid turns blue litmus paper red.b. The liquid boils at 100oC.c. The liquid tastes bitter.d. The liquid is cloudy.

Please make your selectionQuantitative observations are recorded

using

a. Numerical informationb. A controlc. Non-numerical informationd. A system

Please make your selectionA testable statement used for making

predictions and carrying out further experiments is a

a. Lawb. Theoryc. Generalizationd. Hypothesis

Please make your selectionAll but one of these units are SI base units.

The exception is the

a. kilogramb. secondc. literd. Kelvin

Please make your selectionBarium, atomic number 56, is the fifth

element in Group 2. What is the atomic number of radium, the next element in group 2?

a. 64b. 74c. 88d. 103

Please make your selectionThe particles in a solid are

a. packed closely togetherb. constantly in motionc. very far apartd. able to slide past each other

Please make your selectionWhich element has properties most similar

to potassium?

a. boronb. calciumc. sulfurd. nitrogen

Please make your selectionWhich of the following is qualitative?

a. A chemical reaction is complete in 2.3 seconds.

b. The solid has a mass of 23.4 grams.c. The pH of a liquid is 5.d. Salt deposits form from an evaporated

liquid.

Please make your selectionThe symbol for the metric unit used to

measure mass is

a. mb. mmc. gd. L

Please make your selectionThe density of aluminum is 2.70 g/cm3. The

volume of a solid piece of aluminum is 1.50 cm3. Find its mass.

a. 1.50 gb. 2.70 gc. 1.80 gd. 4.05 g

Please make your selection0.06 cm is the same as

a. 0.000 06 mb. 0.006 mmc. 0.06 md. 0.6 mm

Please make your selectionA chemist who frequently carries out a

complex experiment is likely to have high

a. Accuracy, but low precisionb. Precision, but low accuracyc. Accuracyd. Precision

Please make your selectionWritten in scientific notation, the

measurement 0.000 065 mm is

a. 6.5 x 10-4 mmb. 6.5 x 10-5 mmc. 6.5 x 10-6 mmd. 65 x 10-4 mm

Please make your selectionWhen 64.4 is divided by 2.00, the correct

number of significant figures in the result is

a. 1b. 2c. 3d. 4

Please make your selectionThe result of dividing 107 by 103 is

a. 1010

b. 104

c. 10-4

d. 10-10

Please make your selectionBecause most particles fired at metal foil

passed straight through, Rutherford concluded that

a. Atoms were mostly empty spaceb. Atoms contained no charged particlesc. Electrons formed the nucleusd. Atoms were indivisible

Please make your selectionThe number of atoms in 1 mole of hydrogen

is a. 6.022 x 1022

b. 6.022 x 1023

c. 5.022 x 1022

d. 5.022 x 1023

Please make your selectionVisible light, X rays, infrared radiation, and

radio waves all have the same

a. Energyb. Wavelengthc. Energyd. Speed

Please make your selectionA mass of 6.005 g of carbon (atomic mass

12.010 amu) contains

a. 1 mol Cb. 2 atoms Cc. 0.5000 mol Cd. 1 atom O

Please make your selectionThe mass of 1 mole of chromium (atomic

mass 51.996 amu) is

a. 12 gb. 198 gc. 51.996 gd. 6.02 x 1023 g