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3rd Q Review 6
Test Description: 3 rd q review
Instructions: Answer all questions to get your test result.
1) Which statement describes a concept included in the wave-mechanical model of the atom?
A
D) Electrons are located in regions called orbitals.
B
C) Atoms are hard, indivisible spheres.
C
A) Protons, neutrons, and electrons are located in the nucleus
D
B) Electrons orbit the nucleus in shells at fixed distances.
2) Two atoms that are different isotopes of the same element have
A
B) the same number of protons but a different number of neutrons
B
D) a different number of protons and a different number of neutrons
C
C) a different number of protons but the same number of neutrons
D
A) the same number of protons and the same number of neutrons
3) Which term identifies a type of intermolecular force?
A
ionic bonding
B
covalent bonding
C
metallic bonding
D
hydrogen bonding
4) Entropy is a measure of
A
heat
B
the attraction of a nucleus for an electron
C
accuracy
D
the disorder of a system
5) Systems in nature tend to undergo changes toward
A
lower energy and less randomness
B
lower energy and greater randomness
C
higher energy and less randomness
D
higher energy and greater randomness
6) In a neutralization reaction, an aqueous solution of an acid reacts with an aqueous solution of an base to produce
A
another base
B
another acid
C
a salt and an alcohol
D
a salt and water
7) Which radioactive emission has the greatest penetrating power?
A
positron
B
gamma ray
C
beta particle
D
alpha particle
8) Which terms identify two different categories of compounds?
A
covalent and molecular
B
covalent and empirical
C
ionic and molecular
D
ionic and empirical
9) Which statement describes the EARLIST model of the atom?
A
An atom has a small, dense nucleus.
B
An atom is an indivisible hard sphere.
C
Electrons are negative particles in an atom.
D
Electrons in an atom have wave-like properties.
10) Which element is classified as a metalloid?
A
potassium
B
sulfur
C
boron
D
xenon
11) Strontium and barium have similar chemical properties because atoms of these elements have the same number of
A
protons
B
valence electrons
C
electron shells
D
neutrons
12) Distillation is a process used to separate a mixture of liquids based on different
A
freezing points
B
solubilities
C
boiling points
D
densities
13) The arrangement of the elements from left to right in Period 4 on the Periodic Table is based on
A
the number of electron shells
B
the number of oxidation states
C
atomic mass
D
atomic number
14) Which property can be defined as the ability of a substance to be hammered into thin sheets?
A
malleability
B
solubility
C
melting point
D
conductivity
15) Which expression could represent the concentration of a solution?
A
3.5 mL
B
3.5 g
C
3.5 M
D
3.5 mol
16) Which form of energy is associated with the random motion of the particles in a sample of water?
A
thermal energy
B
nuclear energy
C
chemical energy
D
electrical energy
17) Which changes can reach dynamic equilibrium?
A
nuclear changes, only
B
nuclear and physical changes
C
chemical and physical changes
D
chemical changes, only
18) What occurs when a reaction reaches equilibrium?
A
The concentration of the products increase
B
The rate of the forward reaction is slower than the rate of the reverse reaction.
C
The concentration of the reactants increases.
D
The rate of the forward reaction is equal to the rate of the reverse reaction,
19) When the hydronium ion concentration of an aqueous solution is increased by a factor of 10, the pH value of the solution
A
decreases by 1
B
increases by 10
C
decreases by 10
D
increases by 1
20) What occurs when potassium reacts with chlorine to form potassium chloride?
A
Electrons are transferred and the bonding is ionic.
B
Electrons are shared and the bonding is covalent.
C
Electrons are shared and the bonding is ionic.
D
Electrons are transferred and the bonding is covalent.
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