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Get a clicker please. Semester Exam Review. Please make your selection. The study of matter and the changes in matter best describes the science of Biology Physics Microbiology Chemistry. Please make your selection. Chemistry is a biological science. a physical science.

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get a clicker please

Get a clicker please

Semester Exam Review

please make your selection
Please make your selection

The study of matter and the changes in matter best describes the science of

  • Biology
  • Physics
  • Microbiology
  • Chemistry
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Please make your selection

Chemistry is

  • a biological science.
  • a physical science.
  • concerned mostly with living things.
  • the study of electricity.
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Please make your selection

How many valence electrons are in an atom of magnesium?

A) 4

B) 2

C) 3

D) 5

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Please make your selection

The branch of chemistry that includes the study of materials and processes that occur in living things is

  • Organic chemistry
  • Physical chemistry
  • Analytical chemistry
  • Biochemistry
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Please make your selection

The study of substances containing carbon is

  • Organic chemistry
  • Inorganic chemistry
  • Analytical chemistry
  • Biochemistry
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Please make your selection

Technology is

  • Analysis of chemical behavior
  • Application of chemical principles to predict events
  • Application of scientific knowledge to solve problems
  • Study of scientific processes
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Please make your selection

What is the formula of the ion formed when potassium achieves noble-gas electron configuration?

A) K+

B) K-

C) K2+

D) K2-

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Please make your selection

Basic research is

  • Carried out for the sake of increasing knowledge
  • The production and use of products that improve our life.
  • The identification of the components and composition of materials
  • Carried out to solve a problem
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Please make your selection

Which of the following is a heterogeneous mixture?

A) soil

B) air

C) steel

D) salt water

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Please make your selection

Matter includes all of the following except

  • Smoke
  • Water vapor
  • Light
  • Air
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Please make your selection

Chemical properties

  • Include changes of state of a substance
  • Include mass and color
  • Include changes that alter the identity of a substance
  • Can be observed without altering the identity of a substance
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Please make your selection

Two features that distinguish matter are

  • Mass and velocity
  • Weight and velocity
  • Mass and volume
  • Weight and volume
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Please make your selection
  • Who was the man who lived from 460 B.C.–370 B.C. and was among the first to suggest the idea of atoms?
  • A Atomos
  • B Democritus
  • C Thomson
  • D Dalton
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Please make your selection
  • A horizontal row of the periodic table is usually referred to as a
  • A family.
  • B period.
  • C group.
  • D property.
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Please make your selection
  • What does the number 84 in the name krypton-84 represent?
  • A the mass number
  • B the atomic number
  • C twice the number of protons
  • D the sum of the protons and electrons
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Please make your selection
  • In a chemical reaction, the type of products obtained is largely determined by which part of the reacting chemicals?

A protons

B neutrons

C nuclei

D electrons

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Please make your selection
  • The sum of the protons and neutrons in an atom equals the ____.
  • A atomic mass
  • B mass number
  • C atomic number
  • D nucleus number
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Please make your selection
  • Which of the following changes to a metal is a chemical change?
  • A melting
  • B polishing
  • C bending
  • D rusting
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Please make your selection
  • The smallest particle of an element that retains the properties of that element is a(n) ____.
  • A proton
  • B atom
  • C electron
  • D neutron
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Please make your selection
  • What is the net charge of the ionic compound calcium fluoride?
  • A 0
  • B 1
  • C 1–
  • D 2–
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Please make your selection
  • Which of the following elements has the smallest first ionization energy?
  • A potassium
  • B magnesium
  • C sodium
  • D calcium
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Please make your selection
  • The modern periodic table is arranged in order of increasing atomic ____.
  • A radius
  • B mass
  • C number
  • D charge
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Please make your selection
  • Which of the following is a chemical property?
  • A ability to react with oxygen
  • B color
  • C freezing point
  • D hardness
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Please make your selection
  • The first letter in a properly written chemical symbol is always
  • A underlined.
  • B capitalized.
  • C italicized.
  • D bold faced.
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Please make your selection
  • What element has the electron configuration 1s22s22p63s23p2?
  • A silver
  • B selenium
  • C nitrogen
  • D silicon
please make your selection25
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
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Please make your selection
  • The letter "p" in the symbol 4p indicates the ____.
  • A orbital shape
  • B principle energy level
  • C speed of an electron
  • D spin of an electron
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Please make your selection
  • What type of ions have names ending in -ide?
  • A only cations
  • B only metal ions
  • C only anions
  • D only gaseous ions
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Please make your selection
  • Which of the following elements has the smallest ionic radius?
  • A Li
  • B O
  • C K
  • D S
please make your selection29
Please make your selection
  • Which of the following measurements contains two significant figures?
  • A 0.004 40 L
  • B 0.004 04 L
  • C 0.004 00 L
  • D 0.000 44 L
please make your selection30
Please make your selection
  • Which of the following elements forms an ion with a 1– charge?
  • A sodium
  • B fluorine
  • C hydrogen
  • D potassium
please make your selection31
Please make your selection
  • Which state of matter has a definite volume and takes the shape of its container?
  • A solid
  • B liquid only
  • C gas only
  • D both b and c
please make your selection32
Please make your selection
  • What is the charge on the strontium ion?
  • A 2+
  • B 1+
  • C 1–
  • D 2–
please make your selection33
Please make your selection
  • What is the element with the highest electronegativity value?
  • A fluorine
  • B calcium
  • C cesium
  • D helium
please make your selection34
Please make your selection
  • How many significant figures are in the measurement 811.40 grams?
  • A two
  • B five
  • C four
  • D three
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Please make your selection
  • Isotopes of the same element have different

A chemical behavior.

B positions on the periodic table.

C mass numbers.

D atomic numbers.

please make your selection36
Please make your selection
  • Express the sum of 7.68 m and 5.0 m using the correct number of significant digits.

A 13 m

B 12.68 m

C 12.7 m

D 10 m

please make your selection37
Please make your selection
  • Which of the following is a cation?

A Ca2+

B SO32-

C sulfate

D chlorite

please make your selection38
Please make your selection
  • Which state of matter takes both the shape and volume of its container?

A solid

B liquid only

C gas only

D both b and c

please make your selection39
Please make your selection

How many electrons can occupy the s orbital at each energy level?

  • Two, if they have opposite spins
  • Two, if they have the same spin
  • One
  • No more than eight
please make your selection40
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 selection41
Please make your selection

Divide 5.7 m by 2 m. The quotient is correctly reported as

  • 2.8 m
  • 2.85 m
  • 2.9 m
  • 3 m
please make your selection42
Please make your selection

The graph of a direct proportion is a(n)

  • Straight line
  • Ellipse
  • Parabola
  • Hyperbola
please make your selection43
Please make your selection

Argon, krypton, and xenon are

  • Alkaline earth metals
  • Noble gases
  • Actinides
  • Lanthanides
please make your selection44
Please make your selection

Mendeleev is credited with developing the first successful

  • Periodic table
  • Method of determining atomic number
  • Test for radioactivity
  • Use of x-rays
please make your selection45
Please make your selection

Which 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 selection46
Please make your selection

Which element listed is considered to be unreactive (inert) based on its location on the periodic table?

  • Ca
  • P
  • Si
  • Ar
please make your selection47
Please make your selection

Which of the following observations does not indicate that a chemical

change has occurred?

  • a. change of state
  • b. formation of a precipitate
  • c. absorption of energy
  • d. release of a gas
please make your selection48
Please make your selection

What is the atomic number of aluminum?

  • 13
  • 14
  • 26.98
  • 26.9815
please make your selection49
Please make your selection

A neutral atom of selenium contains

  • 34 electrons
  • 78.96 electrons
  • 45 electrons
  • 79 electrons
please make your selection50
Please make your selection

The most useful source of chemical information about the elements is a

  • Calculator
  • Table of metric equivalents
  • Periodic table
  • Table of isotopes
please make your selection51
Please make your selection

Elements in a group in the periodic table can be expected to have similar

a. Atomic masses

b. Atomic numbers

c. Number of neutrons

d. properties

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Please make your selection

A vertical column of blocks in the periodic table is called a(n)

  • Period
  • Group
  • Property
  • Octet
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Please make your selection

The elements that border the zigzag line in the periodic table are

  • Inactive
  • Metals
  • Metalloids
  • nonmetals
please make your selection54
Please make your selection

Which of the following is quantitative?

  • The liquid turns blue litmus paper red.
  • The liquid boils at 100oC.
  • The liquid tastes bitter.
  • The liquid is cloudy.
please make your selection55
Please make your selection

Quantitative observations are recorded using

  • Numerical information
  • A control
  • Non-numerical information
  • A system
please make your selection56
Please make your selection

A testable statement used for making predictions and carrying out further experiments is a

  • Law
  • Theory
  • Generalization
  • Hypothesis
please make your selection57
Please make your selection

All but one of these units are SI base units. The exception is the

  • kilogram
  • second
  • liter
  • Kelvin
please make your selection58
Please make your selection

Barium, atomic number 56, is the fifth element in Group 2. What is the atomic number of radium, the next element in group 2?

  • 64
  • 74
  • 88
  • 103
please make your selection59
Please make your selection

The particles in a solid are

  • packed closely together
  • constantly in motion
  • very far apart
  • able to slide past each other
please make your selection60
Please make your selection

Which element has properties most similar to potassium?

  • boron
  • calcium
  • sulfur
  • nitrogen
please make your selection61
Please make your selection

Which of the following is qualitative?

  • A chemical reaction is complete in 2.3 seconds.
  • The solid has a mass of 23.4 grams.
  • The pH of a liquid is 5.
  • Salt deposits form from an evaporated liquid.
please make your selection62
Please make your selection

The symbol for the metric unit used to measure mass is

  • m
  • mm
  • g
  • L
please make your selection63
Please make your selection

The density of aluminum is 2.70 g/cm3. The volume of a solid piece of aluminum is 1.50 cm3. Find its mass.

  • 1.50 g
  • 2.70 g
  • 1.80 g
  • 4.05 g
please make your selection64
Please make your selection

0.06 cm is the same as

  • 0.000 06 m
  • 0.006 mm
  • 0.06 m
  • 0.6 mm
please make your selection65
Please make your selection

A chemist who frequently carries out a complex experiment is likely to have high

  • Accuracy, but low precision
  • Precision, but low accuracy
  • Accuracy
  • Precision
please make your selection66
Please make your selection

Written in scientific notation, the measurement 0.000 065 mm is

  • 6.5 x 10-4 mm
  • 6.5 x 10-5 mm
  • 6.5 x 10-6 mm
  • 65 x 10-4 mm
please make your selection67
Please make your selection

When 64.4 is divided by 2.00, the correct number of significant figures in the result is

  • 1
  • 2
  • 3
  • 4
please make your selection68
Please make your selection

The result of dividing 107 by 103 is

  • 1010
  • 104
  • 10-4
  • 10-10
please make your selection69
Please make your selection

Because most particles fired at metal foil passed straight through, Rutherford concluded that

  • Atoms were mostly empty space
  • Atoms contained no charged particles
  • Electrons formed the nucleus
  • Atoms were indivisible
please make your selection70
Please make your selection

The number of atoms in 1 mole of hydrogen is

  • 6.022 x 1022
  • 6.022 x 1023
  • 5.022 x 1022
  • 5.022 x 1023
please make your selection71
Please make your selection

Visible light, X rays, infrared radiation, and radio waves all have the same

  • Energy
  • Wavelength
  • Energy
  • Speed
please make your selection72
Please make your selection

A mass of 6.005 g of carbon (atomic mass 12.010 amu) contains

  • 1 mol C
  • 2 atoms C
  • 0.5000 mol C
  • 1 atom O
please make your selection73
Please make your selection

The mass of 1 mole of chromium (atomic mass 51.996 amu) is

  • 12 g
  • 198 g
  • 51.996 g
  • 6.02 x 1023 g