EXERCISE 6-3 Bond Type and Polarity

Click on the correct answer


1	A simple way of assigning descriptive labels to bonds is to assume that metal-nonmetal and metal-polyatomic bonds are ionic and that nonmetal-nonmetal bonds, with two qualifications are polar covalent. Bonds between two atoms of the same element and the carbon-hydrogen bond should be considered nonpolar covalent. Electonegativity differences can also be used but for the purposes of this exercise, use the above guidelines to classify the bonds in each formula unit. Classify the bonding in Br₂.
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


2	NO
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


3	HCl
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


4	MgO
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


5	CH₄
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


6	KF
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


7	CCl₄
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


8	NH₃
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


9	H₂O
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


10	Na₂O
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


11	N₂
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


12	CO
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


13	ICl
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


14	NaBr
		ionic
		polar covalent
		nonpolar covalent
		None of the previous answers.


15	For a molecule to be polar, there must be polar bonds and the bond dipoles must not cancel out. For the following problems, ask if there are any polar bonds and if so draw the Lewis structure and apply VSEPR theory to determine if the molecue is polar. CH₄ is:
		nonpolar
		polar




16	CCl₄ is a _______ molecule.
		nonpolar
		polar




17	CHCl₃ is a _______ molecule.
		nonpolar
		polar




18	CO₂ is a _______ molecule.
		nonpolar
		polar




19	ICl is a _______ molecule.
		nonpolar
		polar




20	H₂O is a _______ molecule.
		nonpolar
		polar




21	HCN is a _______ molecule.
		nonpolar
		polar




22	CH₂O is a _______ molecule.
		nonpolar
		polar