Exam 2 – Due April 17th by 11:59 pm
Started: Apr 14 at 6:01am
Quiz Instructions
Hello everyone,
Here is Exam 2. There are 50 questions @ 3.6 points each (180 points total).
It is due on April 17th by 11:59 pm.
Once the exam is closed, it will not be reopen for any reason.
Do not put this off till the last minute. Give yourself time, for example, if your wifi is slow and anticipate issues connecting and submitting.
If the exam has any errors or you have any questions. Make note and we can discuss these once the exam is over and the answers have been released. I will not edit the exam once posted. Any issues will be addressed afterwards.
Question 1 3.6 pts
Which statement best summarizes the general nature of investigations during the 1800s related to the acquisition and development of knowledge that provided glimpses into the atomic structure of matter?
Group of answer choices
Qualitative observations, influenced by ideas related to magic and mysticism, provide glimpses of the structure of matter.
Quantitative measurements of studies of compounds with fire, lead to the formulation of fundamental laws leading to an atomic theory of matter.
Electricity played an important role in unraveling the structure of the atom.
New experimental and mathematical techniques provided information concerning the organization of subatomic particles in atoms.
Electrolysis is
Group of answer choices
the production of electrical currents from a battery.
the chemical reactions caused by electricity.
the production of cathode rays in vacuum tubes using electricity.
the conversion of elements into new elements by the use of electricity.
Question 33.6 pts
The application of electricity to chemical systems provided much of the experimental evidence for the existence of subatomic particles. With respect to the use of electricity in studying matter, which one of the following scientists would NOT be grouped with the others?
Group of answer choices
Humphry Davy
Michael Faraday
J.J. Thomson
Ernest Rutherford
Question 4
Ions are
Group of answer choices
charged atoms (or groups of atoms).
electrons.
neutrons.
electrodes.
Question 53.6 pts
A cation is a
Group of answer choices
negatively charged ion.
positively charged ion.
negative electrode.
positive electrode.
Question 63.6 pts
Electrolytes are important substances in the chemistry of living systems. An electrolyte is a compound that
Group of answer choices
conducts electricity when melted or put into solution.
generates light when electricity is applied.
contains electrons.
contains electrodes.
Question 73.6 pts
Cathode rays are beams of
Group of answer choices
anions.
electrons.
neutrons.
protons.
PreviousNext
Question 83.6 pts
By measuring the deflection of cathode rays in electrical and magnetic fields, J.J. Thomson was able to determine the
Group of answer choices
mass of the electron.
speed of the electron.
charge on the electron.
ratio of mass to charge for the electron.
Question 93.6 pts
Millikan’s “oil drop” apparatus allowed for the determination of which property of the electron?
Group of answer choices
mass
charge
ratio of mass to charge
speed
Question 10
When combined with Thomson’s determination of the mass to charge ratio of the electron, Millikan’s experimental work allowed for the determination of the
Group of answer choices
charge on the electron.
mass of the electron.
speed of the electron.
all of the above
Question 113.6 pts
An anion is a
Group of answer choices
negatively charged ion.
positively charged ion.
negative electrode.
positive electrode.
Question 123.6 pts
An anode is a
Group of answer choices
negatively charged ion.
positively charged ion.
negative electrode.
positive electrode.
Question 13 3.6 pts
Radioactivity is
Group of answer choices
the spontaneous emission of radiation from unstable elements.
the emission of light from certain substances after exposure to sunlight.
the spontaneous emission of radio waves from matter.
the emission of light from matter when exposed to radio waves.
Question 143.6 pts
Identify the particle that is symbolized by He^2+.
Group of answer choices
alpha, α
beta, β
gamma, γ
delta, δ
Question 153.6 pts
Identify the particle that is the least penetrating.
Group of answer choices
alpha, α
beta, β
gamma, γ
delta, δ
Question 163.6 pts
Which is NOT one of the three types of radiation emitted from radioactive elements?
Group of answer choices
alpha, α
beta, β
gamma, γ
lambda, λ
Question 173.6 pts
Which type of radioactivity has a negative charge?
Group of answer choices
alpha, α
beta, β
gamma, γ
delta, δ
Question 183.6 pts
All of the following types of radiation will be deflected either by a magnetic field or electricity EXCEPT
Group of answer choices
alpha, α.
beta, β.
gamma, γ.
electrons.
Question 193.6 pts
Based upon the experiments of his co-workers, Rutherford proposed that
Group of answer choices
atoms are mostly empty space.
most of the mass of atoms is located in a dense, small volume nucleus.
the nucleus is positively charged.
all of the above
Question 203.6 pts
The difference in mass between protons and neutrons is generally regarded as
Group of answer choices
significant.
insignificant.
unknown.
variable.
Question 213.6 pts
Essentially all of the mass of an atom is due to the
Group of answer choices
protons.
neutrons.
nucleons.
electrons.
PreviousNext
Question 223.6 pts
The mass of a nucleon is
Group of answer choices
1 gram.
1 atomic mass unit (u).
equivalent to the mass of the electron.
0.
Question 233.6 pts
Which statement comparing chemical and nuclear properties of isotopes is correct?
Group of answer choices
Isotopes have similar chemical and nuclear properties.
Isotopes have different chemical and nuclear properties.
Isotopes have different chemical properties, but generally the same nuclear properties.
Isotopes generally have the same chemical properties, but often different nuclear properties.
Question 243.6 pts
The element iron (Fe) occurs naturally as four isotopes. Each of these isotopes has
Group of answer choices
26 protons.
26 electrons.
a different number of neutrons.
all of the above
Question 253.6 pts
The line spectra of atoms provides experimental evidence for
Group of answer choices
the organization of particles in the nucleus of atoms.
the number of protons.
the arrangement of electrons.
all of the above
Question 263.6 pts
As the energy level of an electron increases, the electron’s distance from the nucleus, on average,
Group of answer choices
increases.
decreases.
remains the same.
cannot be predicted.
Question 273.6 pts
When an electron in an excited atom “falls down” to a lower energy level, the excited atom emits a characteristic
Group of answer choices
electron.
neutron.
photon.
proton.
Question 283.6 pts
Give the main shell configuration for chlorine.
Group of answer choices
17
18
2, 8, 7
1, 9, 7
Question 293.6 pts
Which is an IMPOSSIBLE electron configuration?
Group of answer choices
1s2 2s2
1s2 2s2 2p4
1s3 2s2 2p5
1s2 2s2 2p6 3s2
Question 303.6 pts
Which element has the same number of valence electrons as phosphorus?
Group of answer choices
Rb
Bi
In
Te
Question 323.6 pts
The inertness of the noble gases is due to
Group of answer choices
the outermost shell has six electrons.
the number of protons and neutrons.
the bonds they form with other elements.
the outermost shell has an octet of electrons, except for helium which has two electrons.
Question 333.6 pts
A chloride ion, Cl- has the same electron configuration as a(n)
Group of answer choices
sodium atom.
chlorine atom.
neon atom.
argon atom.
PreviousNext
Question 343.6 pts
When calcium reacts with iodine, calcium ions, Ca2+, and iodide ions, I-, are formed. In this reaction, calcium atoms
Group of answer choices
lose electrons.
gain electrons.
lose protons.
gain protons.
Question 353.6 pts
With respect to chemical bonding, which particles play the most active role?
Group of answer choices
protons
neutrons
valence electrons
core electrons
Question 363.6 pts
How many dots would you draw around sulfur to show sulfur’s electron dot structure?
Group of answer choices
2
4
6
8
Question 373.6 pts
The attraction between positive and negative ions is known as a(n)
Group of answer choices
covalent bond.
crystal bond.
ionic bond.
molecular bond.
Question 383.6 pts
Which pair of atoms would form an ionic bond?
Group of answer choices
Na and Mg
Ca and S
Cl and Br
N and N
Question 393.6 pts
The anion formed when oxygen gains two electrons is called the
Group of answer choices
oxygen ion.
oxyide ion.
oxide ion.
oxy ion.
Question 403.6 pts
For which atom is it difficult to predict the most probable ionic charge using the periodic table?
Group of answer choices
H
Fe
O
Ne
Question 413.6 pts
The name of the compound S2O3 is
Group of answer choices
disulfur oxide.
disulfur trioxide.
sulfur oxide.
sulfur trioxide.
Question 423.6 pts
Which one of the following has the LOWEST electronegativity?
Group of answer choices
sodium
oxygen
chlorine
fluorine
Question 433.6 pts
Which substance has polar covalent bonds?
Group of answer choices
SO2
N2
F2
BaO
Question 443.6 pts
Which of the following pairs of atoms will form a polar covalent bond?
Group of answer choices
Ne and Ar
H and O
H and C
C and C
Question 453.6 pts
The formula of iron(II) phosphate is
Group of answer choices
FePO4.
Fe2PO4.
Fe2(PO4)3.
Fe3(PO4)2.
Question 463.6 pts
What is the name of NaH2PO4?
Group of answer choices
sodium hydrogen phosphate
sodium dihydrogen phosphate
monosodium dihydrogen monophosphate
sodium(II) dihydrogen monophosphate
Question 473.6 pts
Which of the following elements can form four bonds with other atoms?
Group of answer choices
S
Br
Si
P
Question 483.6 pts
Atoms and molecules with odd numbers of electrons are called
Group of answer choices
ions.
odd.
covalent
free radicals.
Question 493.6 pts
The valence shell electron pair repulsion theory (VSEPR) is used to
Group of answer choices
predict the bonding pattern in molecules.
predict the three dimensional structure of molecules.
predict the electronegativity of atoms.
predict the number of multiple bonds in a molecule.
Question 503.6 pts
The shape of a water molecule is
Group of answer choices
linear.
bent.
tetrahedral.
trigonal planar.