AP Chemistry › Compounds and Molecules
Which of the following compounds contains the most π bonds?
CO2
H2O
CH4
NH3
C2H6
π bonds occur when there is greater than a single bond (double or triple bond). The only compound listed with double bonds or greater is CO2, meaning it is the one that contains the most π bonds.
How many lone pairs of electrons exist on the following molecule?
BF3
1
0
9
10
11
.. ..
:F — B — F: Boron can have a violated octet (6 e-) and each F has 3 lone pairs
.. | .. for a total of 9 pairs of unpaired electrons
:F:
..
Which of the following compounds contains the most π bonds?
CO2
H2O
CH4
NH3
C2H6
π bonds occur when there is greater than a single bond (double or triple bond). The only compound listed with double bonds or greater is CO2, meaning it is the one that contains the most π bonds.
How many lone pairs of electrons exist on the following molecule?
BF3
1
0
9
10
11
.. ..
:F — B — F: Boron can have a violated octet (6 e-) and each F has 3 lone pairs
.. | .. for a total of 9 pairs of unpaired electrons
:F:
..
Which of the following compounds contains the most π bonds?
CO2
H2O
CH4
NH3
C2H6
π bonds occur when there is greater than a single bond (double or triple bond). The only compound listed with double bonds or greater is CO2, meaning it is the one that contains the most π bonds.
Which of the following statements best describes ionic compounds?
3-D arrays of charged particles
Formed when molecules share electrons
Neutral particles that donate electrons
Malleable compounds that lack structural stability
The definition of ionic compounds are three-dimensional arrays of atoms held together by strong ionic bonds. Ions are charged particles that have either gained or lost a certain number of electrons. They have great crystalline strength because of the strong electrostatic forces between the ions.
Which of the following statements best describes ionic compounds?
3-D arrays of charged particles
Formed when molecules share electrons
Neutral particles that donate electrons
Malleable compounds that lack structural stability
The definition of ionic compounds are three-dimensional arrays of atoms held together by strong ionic bonds. Ions are charged particles that have either gained or lost a certain number of electrons. They have great crystalline strength because of the strong electrostatic forces between the ions.
How many lone pairs of electrons exist on the following molecule?
BF3
1
0
9
10
11
.. ..
:F — B — F: Boron can have a violated octet (6 e-) and each F has 3 lone pairs
.. | .. for a total of 9 pairs of unpaired electrons
:F:
..
Which of the following statements best describes ionic compounds?
3-D arrays of charged particles
Formed when molecules share electrons
Neutral particles that donate electrons
Malleable compounds that lack structural stability
The definition of ionic compounds are three-dimensional arrays of atoms held together by strong ionic bonds. Ions are charged particles that have either gained or lost a certain number of electrons. They have great crystalline strength because of the strong electrostatic forces between the ions.
Which of the following best explains hydrogen bonding?
Electronegative atoms carry most of the electrons in the shared pairs when they are bonded to hydrogen
Hydrogen does not have any electrons
The covalent bonds between other atoms are hydrogen are called hydrogen bonds
There are too many electrons in a solution, so H atoms interact with them
Electronegative atoms disproportionately pull covalently bonded electrons toward themselves, which leaves hydrogen with partial positive character.