Chapter 5 & 6 Test - Multiple Choice (Choose the best answer.)
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___ 5.
Which of the statements about ionic solids is FALSE?
Ionic solids conduct electricity when dissolved in water.
Ionic solids have high melting temperatures.
Ionic solids are good conductors of electricity.
Ionic solids can be formed by reacting an alkali metal with a halogen.
Ionic solids form crystals.
Which of the pairs of elements listed will NOT form an ionic solid?
barium and iodine
d. oxygen and hydrogen
calcium and oxygen
e. cesium and fluorine
lithium and chlorine
Which combination(s) is/are most likely to form predominantly covalent bonds?
Potassium-Chlorine
d. More than one of the above
Oxygen-Oxygen
e. None of the above
Hydrogen-Carbon
Which combination(s) is/are most likely to form predominantly ionic bonds?
Potassium-Chlorine
e. None of the above
Oxygen-Oxygen
Hydrogen-Carbon
More than one of the above
Which of the statements given concerning chemical bonding is FALSE?
a. Energy is required to break any chemical bond.
b. Energy must be released if two atoms are to form a chemical bond.
c. A chemical bond occurs only if the potential energy is lowered.
d. All chemical reactions require a transfer of electrons in forming new bonds.
e. Chemical bonds are due to electrostatic forces of attraction and repulsion.
___ 6.
Which of the following compounds would not be expected to have hydrogen bonding between
molecules in the liquid or solid?
a. NH3
d. HF
b. HCOOH
e. H2O
c. H2
___ 7.
Magnesium Bromide is a (an) ________ compound.
a. metallic
d. hybrid
b. covalent
e. polar
c. ionic
___ 8.
Metals tend to _______ electrons to become _____ ions.
a. lose, positive
d. lose, negative
b. gain, negative
e. gain, positive
c. lose, neutral
___ 9.
Non-metals tend to _______ electrons to become ________ ions.
a. lose, positive
d. lose, negative
b. gain, negative
e. gain, positive
c. lose, neutral
___ 10.
What combinations of two elements from the list V - Z are most likely to form an ionic solid?
a. V and W
d. X and Y
b. X and Z
e. V and Y
c. Y and Z
___ 11.
What is the empirical formula for a compound formed by the combination of V and X?
a. VX
d. V3X2
b. V2X3
e. VX3
c. V3X
___ 12.
What is the empirical formula formed by combining X and Z?
a. XZ
d. X2Z
b. X3Z
e. X7Z5
c. XZ3
___ 13.
Write the chemical formula for a compound that has one Calcium atom and 2 Chlorine atoms. Predict
the bond between them.
a. CaCl2, ionic
d. CCl4, covalent
b. CaCl2, covalent
e. Cal2Ch4, covalent
c. Ca2Cl, ionic
___ 14.
Hydrogen Fluoride has a (an) ________ bond and its chemical formula is ________.
a. covalent, HF
d. ionic, HF2
b. ionic, HF
e. metallic.H2F4
c. covalent, H2F
___ 15.
How is the bond in F2 different from the bond in KCl ?
a. F2 is covalent and KCl is ionic
d. F2 is magical and KCl is normal
b. F2 is ionic and KCl is ionic
e. F2 is covalent and KCl is covalent
c. F2 is ionic and KCl is covalent
___ 16.
Oxygen has 6 valence electrons and it is diatomic. How many covalent bonds are there in an O2
molecule?
a. single
d. none
b. double
e. it varies
c. triple
___ 17.
Ionic bond is formed between atoms of ________ and _______.
a. metals & non-metals
d. free radicals & hydrogen
b. metals
e. molecules of the same element
c. non-metals
___ 18.
From the list of elements given, select 2 elements that would likely form an ionic bond. K, C, Br, Ar.
a. K, Br
c. K, Ar
e. C, Br
b. Ar, C
d. K, C
___ 19.
Calcium Oxide is a (an) _____ compound and the formula for Calcium Oxide is ________.
a. covalent, CaO2
d. Metallic, CO2
b. ionic, CaO
e. Covalent, Co2
c. ionic, CaO2
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In a covalent bond, electrons are _______.
lost or gained
d. converted to protons
shared
e. none of the above
stolen
An atom that has lost or gained electrons becomes a (an) _______.
proton
d. polyatomic molecule
electron
e. ion
nucleus
Charged atoms are called _____.
protons
d. radioactive
electrons
e. ions
neutrons
In an ionic bond, electrons are _________ .
lost or gained
d. oxidized
shared
e. none of the above
converted to photons
When a Na atom, loses one electron, it gets a charge of _______.
-1
d. -2
+1
e. +11
0
Covalent bond is formed between atoms of ________.
metals
d. metals and non-metals
non-metals
e. even integers
non-associated polyatomic variables
The chemical formula of the product formed from the reaction between Mg and O2 is _______.
MgO2
d. MnO
MgO
e. Mg4O2
Mg2O
N has 5 valence electrons and it is diatomic. How many covalent bonds are there in a N2 molecule ?
single
d. +2/-1
double
e. none
triple
The bond formed when Mg combines with O2 is _____.
ionic
d. variable
covalent
e. hydrogen bonds
metallic
When a Cl atom gains an electron, it gets a charge of ________.
-1
d. -7
+1
e. +7
0
The process of becoming an ion from an atom is called as ________.
ionization
d. Haber Process
electrolysis
e. vulcanization
electron affinity