Bond Types
Which compound has covalent bonds?
K2O Li2O H2O Na2O
H2O
Which substance has nonpolar covalent bonds?
Cl2 CCl4 SO3 SiO2
Cl2
What is the total number of electrons shared between the atoms represented in the formula: O2
4
Define Covalent bond
- electrons are shared
- between a nonmetal and nonmetal
- does not conduct electricity
The degree of polarity of a covalent bond between two atoms is determined by calculating the difference in their
electronegativites
Which element reacts with oxygen to form ionic bonds?
hydrogen calcium chlorine nitrogen
calcium
Which bond is most polar?
H–O S–O N–O C–O
N–O
What is the total number of electrons shared between the atoms represented in the formula: N2
6
Define Ionic Bond
- electrons are transferred
- between a metal and nonmetal
- does conduct electricity
True or false: Solid ionic compounds conduct electricity.
False, they only conduct electricity when dissolved in water.
State the type of chemical bond between a hydrogen atom and the nitrogen atom in the molecule NH3
(Polar) Covalent
The least polar bond is found in a molecule of
HBr HF HCl HI
HI
What is the total number of pairs of electrons shared between the atoms represented in the formula: CO
3
Define Polyatomic Ion
Which formula represents a molecular compound?
Kr LiOH N2O4 NaI
N2O4
Which substance contains bonds that involved the transfer of electrons from one atom to another?
Cl2 NH3 CO2 KBr
KBr
Identify the type of bonding between the atoms in an O2 molecule
Nonpolar Covalent
Determine the number of electrons shared in the bond between a hydrogen atom and a carbon atom in the molecule: CH3CO2CH2CH3
2
What does it mean for a bond to be polar?
- There is a large difference in electronegativities
- Electrons are shared unequally
- the two sides are different
When potassium reacts with chlorine to form potassium chloride, electrons are (shared or transferred) and the bonding is (ionic or covalent).
transferred; ionic
Explain, in terms of element classification, why silver chloride (AgCl) is an ionic compound.
Ag is a metal, Cl is a nonmetal
the bonds in BaO are (ionic or covalent) and electrons are (shared or transferred)
ionic; transferred
Determine the total number of electrons in the bonds between the nitrogen atom and the three hydrogen atoms in NH3
6
What does it mean for a bond to be nonpolar?
- There is a very small difference in electronegativities
- Electrons are shared equally
- the two sides are similar
A solid sample of copper is an excellent conductor of electric current. Which type of chemical bonds are in the sample?
metallic bonds