chem: midterm chemical bonding review
How many double bonds are in the Lewis structure for CHO-1?
1
A covalent chemical bond requires how many pairs of electrons?
1 pair of electrons
How many valence electrons should be represented in the Lewis structure for SO4-2 ?
32
How many electrons are needed in the outer energy level of most atoms for the atom to be chemically stable?
8
What is the strongest intermolecular force present for HBr?
Dipole
Which substance has the greatest ionic characteristics?
Na2O
Which of the following is the correct structural formula for silicon dioxide, SiO2?
O=Si=O
Which of the following is NOT a diatomic element?
Sulfur
Match the following compounds to its correct bond type: ionic polar covalent or nonpolar covalent: MgO
a. ionic
Match the following compounds to its correct bond type: ionic polar covalent or nonpolar covalent CoS
b. polar covalent
In an ionic bond, how does a nitrogen atom most commonly achieve an octet of electrons?
by gaining 3 electrons.
Match the following compounds to its correct bond type: ionic polar covalent or nonpolar covalent CH4
c. nonpolar covalent
If you were going to draw the Lewis structure for CHO-1, the central atom should be:
carbon
Ionic bonds form between ions when _________ are attracted to one another
cation and anion
Match the following compounds to its correct bond type: ionic polar covalent or nonpolar covalent NF3
d. polar covalent
The strong forces of attraction between the positive and negative regions of molecules are called
dipole-dipole forces
Match the following compounds to its correct bond type: ionic polar covalent or nonpolar covalent N2
e. nonpolar covalent
What type of bond would be found between atoms of potassium and oxygen?
ionic
An SiO2 molecule is:
linear
Unbonded pairs of electrons are called
lone pairs, unshared pairs
The chemical bond formed when two atoms share electrons equally
non polar covalent
Covalent bonds form by
sharing electrons between atoms
A molecule of CCl4 is:
tetrahedral and nonpolar
