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WorksheetsMidterm Review
Total questions: 100
Worksheet time: 50mins
0.095 cm is the same as
0.95 mm.
0.095 m.
95 m.
0.0095 mm.
5.600 L of water is equal to
560 mL.
0.00560 mL.
5600 mL.
5600. mL.
Which of these metric units would you use to measure length?
L
mg
kg
m
If 1 mile equals 1.61 km, how many kilometers are in 3570 yards? (1 mile = 1760 yards)
1.42 km
30.7 km
0.0825 km
3.27 km
How many significant figures are in the measured value of 0.0058350 kg?
5
4
3
2
Round the measurement 0.034770 m to two significant figures.
0.03m
3.4 x 10^2 m
0.035 m
0.0348 m
When 6.5 m is divided by 3 s, how should the answer be correctly recorded?
2.2 m/s
2 m/s
2.17 m/s
2.0 m/s
How is 0.0000860 cm written in scientific notation?
86 x 10^6 cm
8.6 x 10^-6 cm
8.6 x 10^5 cm
8.60 x 10^-5 cm
What is the density of 67.55 g of material with a volume of 8.30 cm3?
8.136 g/cm3
8.14 g/cm3
560. g/cm3
0.123 g/cm3
The nucleus of an atom has all of the following characteristics except that it
is positively charged.
is very dense.
contains nearly all of the atom’s mass.
contains nearly all of the atom’s volume.
Which of the following is an example of a chemical property?
reactivity with oxygen
boiling point
texture
mass
What type of matter is formed when two or more elements are chemically combined?
heterogeneous mixture
homogeneous mixture
pure substance
a solution
The horizontal rows on the periodic table are called:
families.
periods.
elements.
rows.
The number of atoms in a mole of any pure substance is called
its atomic number
its mass number
Avogadro’s number.
gram-formula mass
Valence electrons are s- and p- electrons
in the highest energy level.
combined with all neutrons.
closest to the nucleus.
in the lowest energy level.
The number of orbitals in the d-sublevel is
1.
3.
5.
7.
The total number of protons and neutrons in the nucleus of an atom is its
mass number.
average atomic mass.
Avogadro’s number.
atomic number.
What is the name for a negative ion?
cation
anion
valence electron
minus ion
A three-dimensional region around the nucleus where an electron may be found is called a(n) ______.
path.
orbital.
spectral line.
shell.
orbit.
What is a nuclear particle that has about the same mass as a proton, but has no charge?
electron
neutron
isotope
nuclide
How many protons, neutrons, and electrons are there for _{22}^{48}Ti^{2+}?
p=26, n=22, e=22
p=22, n=26, e=20
p=22, n=26, e=24
p=22, n=26, e=20
Calculate the average atomic mass of element X. Then, identify element X. ^{14}X-95% abundance, ^{15}X-3% abundance.
nitrogen
oxygen
chlorine
sulfur
A chlorine isotope contains 17 protons, 17 electrons, and 18 neutrons. What is its mass number?
17
35
18
34
How many moles of atoms are in 30.15 g of silver?
325.2 mol
0.3000 mol
3252 mol
0.2795 mol
Which statement below best describes why an atom is electrically neutral?
The number of protons and neutrons are equal.
The number of protons and electrons are equal.
The neutrons balance out the protons and the electrons.
The nuclear forces stabilize the charges, causing it to be a net neutral.
Identify the element with the following electron configuration: 1s^22s^22p^63s^23p^64s^23d^{10}4p^3
Mg
S
As
Ge
What is the molecular shape of carbon tetrachloride, CCl4?
tetrahedral
trigonal planar
trigonal pyramidal
linear
Because most particles fired at the gold foil passed straight through, Rutherford concluded that ______.
electrons formed the nucleus.
atoms contained no charged particles.
atoms are indivisible.
atoms are mostly empty space.
What must happen in order for an electron to change from the ground state to an excited state?
Energy must be released.
Energy must be absorbed.
Radiation must be emitted.
The electron must move from a higher energy level to a lower energy level.
A volume of 1 mL is equal to
1 g.
1 L.
1 cm^3.
10 dm^3.
Phosphorus-33 contains
33 neutrons.
18 protons
33 protons
18 neutrons
Thomson’s experiments with cathode rays led to the discovery of the ______.
neutron
nucleus
proton
electron
Which of the following lists atomic orbitals in the correct order of filling according to the Aufbau principle?
1s2s2p3s3p4s4p3d4d
1s2s2p3s3p4s4p5s
1s2s2p3s3p4s3d4p5s
1s2s2p3s4s3p3d4p5s
Which element has the noble gas configuration [Kr]5s2?
strontium
cesium
krypton
barium
Which pair of elements below will form the least polar bond?
O and F
Li and S
Na and Cl
Li and P
Which of the following lists the first four sublevels with the maximum number of electrons that can fill each sublevel correctly?
s2,p4,d6,f8
s1,p2,d3,f4
s2,p6,d10,f14
s1,p3,d5,f7
What is the number of atoms in 1 mol of carbon?
12.01 x 10^22 atoms
12.01 x 10^23 atoms
6.022 x 10^22 atoms
6.022 x 10^23 atoms
What is the mass of a sample of arsenic that contains 3.01 x 10^23 atoms of arsenic?
11 g
72.6 g
37.4 g
59.3 g
Rutherford’s experiments led him to conclude that atoms contain massive, dense central regions that have
both protons and neutrons
a positive charge
a negative charge
no charge
Most of the volume of an atom is occupied by the
nucleus
neutrons
protons
electrons
What is the number of electrons located in the highest energy level of a xenon atom?
6
8
10
2
What type of radiation would have a wavelength of 10-2 m?
x-rays
microwave
Long radio waves
infrared
A radiation has a wavelength of 525 nm. What color would this radiation give off?
blue
violet
red
green
The density of aluminum is 2.70 g/cm3. What is the mass of a sample of solid aluminum with a volume of 1.50 cm3?
1.80 g
4.05 g
0.556 g
4.30 g
A sample of pure gold has a mass of 49.40 g. How many gold atoms are in the sample?
1.510 x 10^23 atoms
3.021 x 10^23 atoms
6.022 x 10^23 atoms
1.616 x 10^-20 atoms
If repeated trials of measurements agree closely, but differ widely from the accepted value, they are:
accurate, but not precise.
both precise and accurate.
precise, but not accurate.
neither precise nor accurate.
Which of the following atoms' Lewis dot notation shows six valence electrons?
nitrogen
magnesium
sulfur
iodine
How many electrons can occupy the s-sublevel at each energy level?
two, if they have the same spin
no more than 6
two, if they have opposite spins
10
Identify the element depicted by the orbital notation below.
Al
Ga
In
Ge
Which of the following is the electron configuration for sulfur?
1s²2s²2p⁶3s²3d¹
1s²2s²2p⁶
1s²2s²2p⁶3s²3p⁴
1s²2s²2p⁶3s²3p⁶3d¹
The element symbols in this Lewis Structure have been replaced with X and Y. Which of the compounds below could be represented by this Lewis Structure? X≡Y
F₂
KCl
CO
O₂
What is the mass of a 3.50 mol sample of pure silicon?
98.3 g
28.0 g
0.125 g
35.1 g
Isotopes are atoms of the same element that have different
numbers of protons.
different chemical properties
numbers of electrons
masses.
What does the 70 in ₇₀³¹⁷₇₀Y represent?
the atomic number
the number of neutrons
the mass number
the group number
Which of these compounds would have the highest melting point?
NH₃
OF₂
H₂O
NaCl
Balance the following nuclear equation. ²²⁶₈₈Ra → ²²²₈₆Rn + _____
⁴₂He
¹₀n
¹₁H
⁰₋₁e
Balance the following nuclear equation. ⁹₄Be + ²⁴₂He → ¹²₆C + _____
⁴₂He
¹₀n
¹₁H
⁰₋₁e
How much of the original 0.520 g sample of radium-226 remains after 4797 years? The half-life of radium-226 is 1599 years.
2.00 g
0.500 g
0.0650 g
0.00520 g
The idea of arranging the elements in the periodic table according to their chemical and physical properties, and atomic mass is attributed to
Bohr.
Ramsay.
Moseley.
Mendeleev.
The melting points of ionic compounds are higher than the melting points of molecular compounds because
ionic compounds are brittle.
attractive forces between ions are stronger than the attractive forces between molecules.
Ionic substances are all flammable.
none of the above
The periodic law states that the properties of elements are periodic functions of their atomic number. What determines the position of each element on the periodic table?
mass number
number of protons
number of isotopes
number of neutrons
Elements within the same group or column in the periodic table can be expected to have similar
atomic masses.
properties.
atomic numbers.
number of protons.
Which of the following molecules has a single lone pair of electrons?
HCl
CH₄
H₂O
NH₃
Which of the following is the correct Lewis structure for hydrogen chloride, HCl?
:H—Cl
:H—Cl:
H—:Cl:
:H—:Cl:
What are the elements in Group 1 known as?
alkali metals
alkaline earth metals
rare earth metals
group 1 metals
What is the energy required to remove an electron from an atom?
electron affinity
electron energy
electronegativity
ionization energy
What is an atom’s ability, in a chemical compound, to attract electrons called?
electron affinity
electron energy
electronegativity
ionization energy
One half the distance between the nuclei of identical atoms that are bonded together is called
atomic radius
atomic diameter
atomic volume
electron cloud
Which of the following elements has the greatest electronegativity?
oxygen
sodium
chlorine
fluorine
Moving across a period in the periodic table, as atomic number increases, what generally happens to atomic radius?
decreases
remains constant
increases
none of these
Which of the following is the best reason for the increase in atomic radius going down a group of elements?
increased positive nuclear charge
The number of neutrons increases.
The number of occupied energy levels increase.
A new octet forms.
The combination of the nuclei of small atoms to form a larger nucleus is called nuclear
decay
fusion
fission
meltdown
What is the splitting of the nucleus of a large atom into two or more fragments?
nuclear decay
nuclear fusion
nuclear fission
nuclear meltdown
The ions in most ionic compounds are organized into a
molecule
crystal lattice
Lewis Structure
polyatomic ion
The VSEPR theory is a model for predicting
the strength of metallic bonds.
the lattice energy.
ionization energy.
the shape of the molecule.
0.095 cm is the same as
0.95 mm.
0.095 mm.
95 m.
0.0095 mm.
5.600 L of water is equal to
560 mL.
0.00560 mL.
5600 mL.
5600. mL.
Which of these metric units would you use to measure length?
L
mg
kg
m
If 1 mile equals 1.61 km, how many kilometers are in 3570 yards? (1 mile= 1760 yards)
1.42 km
30.7 km
0.0825 km
3.27 km
How many significant figures are in the measured value of 0.0058350 kg?
5
4
3
2
Round the measurement 0.034770 m to two significant figures.
0.03m
3.4 x 10^2 m
0.035 m
0.0348 m
When 6.5 m is divided by 3, how would the answer be correctly recorded?
2.2 m/s
2 m/s
2.17 m/s
2.0 m/s
How is the 0.0000860 cm written in scientific notation?
86 x 10^-6 cm
8.6 x 10^-6 cm
8.6 x 10^-5 cm
8.60 x 10^-5 cm
What is the density of 67.55 g of material with a volume of 8.30 cm^3?
8.136 g/cm^3
8.14 g/cm^3
560. g/cm^3
0.123 g/cm^3
The nucleus of an atom has all of the following characteristics except that it
is positively charged.
is very dense.
contains nearly all of the atom’s mass.
contains nearly all of the atom’s volume.
Which of the following is an example of a chemical property?
reactivity with oxygen
boiling point
texture
mass
What type of matter is formed when two or more elements are chemically combined?
heterogeneous mixture
homogeneous mixture
pure substance
a solution
The horizontal rows on the periodic table are called
families.
periods.
elements.
rows.
The number of atoms in a mole of any pure substance is called
its atomic number
its mass number
Avogadro’s number.
gram-formula mass
Valence electrons are s- and p- electrons
in the highest energy level.
combined with all neutrons.
closest to the nucleus.
in the lowest energy level.
The number of orbitals for the d- sublevel is
1.
3.
5.
7.
The total number of protons and neutrons in the nucleus of an atom is its
mass number.
average atomic mass.
Avogadro’s number.
atomic number.
What is the name for a negative ion?
cation
anion
valence electron
minus ion
A three-dimensional region around the nucleus where an electron may be found is called a(n) ______.
path
orbit
orbital
spectral line
shell
What is a nuclear particle that has about the same mass as a proton, but has no charge?
electron
neutron
isotope
nuclide
How many protons, neutrons, and electrons are there for _{22}^{48}Ti^{2+}?
p=26, n=22, e=22
p=26, n=22, e=26
p=22, n=26, e=20
p=22, n=26, e=24
Calculate the average atomic mass of element X. ^{14}X- 95% abundance, ^{15}X- 3% abundance.
nitrogen
oxygen
chlorine
sulfur
A chlorine isotope contains 17 protons, 17 electrons, and 18 neutrons. What is its mass number?
17
35
18
34
How many moles of atoms are in 30.15 g of silver?
325.2 mol
0.3000 mol
3252 mol
0.2795 mol
Which statement below best describes why an atom is electrically neutral.
The number of protons and neutrons are equal.
The number of protons and electrons are equal.
The neutrons balance out the protons and the electrons.
The nuclear forces stabilize the charges, causing it to be a net neutral.
