Chemistry Chapter 6 (Sections 1-4) Review

A chemical bond results from the mutual attraction of the nuclei for

• electrons

• neutrons

• protons

• dipoles

A polar covalent bond is likely to form between two atoms that

• are similar in electronegativity

• are of similar size

• differ in electronegativity

• have the same number of electrons

The Lewis structure of HCN contains

• one double bond and one single bond

• one triple bond and one single bond

• two single bonds

• two double bonds

Which molecule contains a double bond?

• COCl₂

• H₂O

• CF₄

• SF₂

Which of the following compounds would be predicted to have the highest boiling point?

• HCl

• NaCl

• Cl₂

• SO₂

An unknown substance is an excellent electrical conductor in the solid state and is malleable. What type of chemical bonding does this substance exhibit?

• ionic bonding

• covalent bonding

• metallic bonding

• cannot determine from the information given

In general, the ________ the difference in electronegativity between two atoms, the greater the ionic character.

• greater

• lesser

• cannot not determine based on electronegativity alone

What is the meaning of the term polar, as applied to chemical bonding?

• there is an uneven distribution of charge

• there is an even distribution of charge

• there is no charge

• the charges between the atoms are balanced

In a Lewis structure, which atom is usually the central atom?

• carbon, if present, or else the least-electronegative atom (UNLESS that is Hydrogen, since it can never be the central atom)

• there's really no way to tell without drawing a Lewis structure

• It is always the first element alphabetically

• whichever is listed first in the chemical formula

In Lewis structures, how is a multiple bond determined?

• when there are not enough valence electrons to complete octets by adding unshared pairs

• when all atoms have an octet and you still have electrons left over

• when all atoms have at least one unshared pair of valence electrons

• this only happens in polyatomic ions