Ionic Bonding - GRE Subject Test: Chemistry
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Which of the following compounds is not held together by ionic bonds?
Which of the following compounds is not held together by ionic bonds?
Covalent bonds are formed when two nonmetals are bonded together. This covalent bond means that the electrons are shared by the two atoms in order to satisfy each atom's octet. There is very little difference in the electronegativities of the two atoms involved in the bond, so neither atom pulls the electrons closer to its nucleus.
Ionic bonds are formed between a metal and a nonmetal. Due to the dramatic difference between the electronegativities of metals and nonmetals, the electrons are pulled tightly to the nonmetal, and away from the metal nucleus. This results in each atom having a full octet, even though the electrons are not shared.
Carbon and oxygen are both nonmetals, so we would expect only covalent bonds in carbon dioxide.
Covalent bonds are formed when two nonmetals are bonded together. This covalent bond means that the electrons are shared by the two atoms in order to satisfy each atom's octet. There is very little difference in the electronegativities of the two atoms involved in the bond, so neither atom pulls the electrons closer to its nucleus.
Ionic bonds are formed between a metal and a nonmetal. Due to the dramatic difference between the electronegativities of metals and nonmetals, the electrons are pulled tightly to the nonmetal, and away from the metal nucleus. This results in each atom having a full octet, even though the electrons are not shared.
Carbon and oxygen are both nonmetals, so we would expect only covalent bonds in carbon dioxide.
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Given the salt 
, what is the charge on the manganese ion in this molecule?
Given the salt
In order to determine the charge of the transition metal manganese in the molecule, 
, we must first determine the net charge of the molecules it is bonded to. The manganese is bonded to three fluoride ions. Fluoride ion carries a negative one charge. since it is a halogen The subscript in front of the fluoride in the molecule tells us that we have three fluoride ions. Each fluoride ion carries a 
charge and because we have 3 of them, there is a total charge of 
from these fluoride ions. Molecules like to exist in their most stable state which gives them an overall charge of zero. Therefore, the manganese atom will carry a charge of 
to counter the 
charge from the three fluoride ions.
In order to determine the charge of the transition metal manganese in the molecule,
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Which of the following solids is most ionic?
Which of the following solids is most ionic?
An ionic bond is a bond that occurs between a metal and a nonmetal, which may dissociate into two ions of opposite charges (positive and negative). These bonds are formed by electrostatic forces. We can determine if a compound is ionic from what it is composed of. Ionic compounds can easily be identified because they are generally composed of a metal and non-metal such as 
. Metals are cations and non-metals are anions. In the options given, the substance that contains an ionic bond is 
. The ions involved are 
and 
.
An ionic bond is a bond that occurs between a metal and a nonmetal, which may dissociate into two ions of opposite charges (positive and negative). These bonds are formed by electrostatic forces. We can determine if a compound is ionic from what it is composed of. Ionic compounds can easily be identified because they are generally composed of a metal and non-metal such as
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Given the salt 
, what is the charge on the barium ion in this molecule?
Given the salt
In order to determine the charge of the barium ion in the molecule, 
, we must first determine the net charge of the molecules it is bonded to. The barium ion is bonded to two fluoride ions.
Fluoride ion carries a -1 charge. The subscript in front of the fluoride in the molecule tells us that we have two fluoride ions. Each fluoride ion carries a -1 charge and because we have 2 of them, there is a total charge of -2 from these fluoride ions. Molecules like to exist in their most stable state which gives them an overall charge of zero. Therefore, the barium atom will carry a charge of +2 to counter the -2 charge from the two fluoride ions.
In order to determine the charge of the barium ion in the molecule,
Fluoride ion carries a -1 charge. The subscript in front of the fluoride in the molecule tells us that we have two fluoride ions. Each fluoride ion carries a -1 charge and because we have 2 of them, there is a total charge of -2 from these fluoride ions. Molecules like to exist in their most stable state which gives them an overall charge of zero. Therefore, the barium atom will carry a charge of +2 to counter the -2 charge from the two fluoride ions.
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Given the salt 
, what is the charge on the 
ion in this molecule?
Given the salt
In order to determine the charge of the 
ion in the molecule, 
, we must first determine the net charge of the molecules it is bonded to. The 
ion is bonded to a 
ions.
ion is one a common anion and carries a -2 charge. Molecules like to exist in their most stable state which gives them an overall charge of zero. 
has an overall charge of zero. Therefore, the 
atom will carry a charge of +2 to counter the -2 charge from the 
ion.
In order to determine the charge of the
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