Chemistry Quiz on Covalent Bonds and Lewis Structures

A covalent bond in which there is an unequal attraction for the shared electrons is

• nonpolar

• polar

• ionic

• Dipolar

To draw a Lewis structure, it is NOT necessary to know

• which atoms are in the molecule

• the total number of electrons in the molecule

• the number of valence electrons for each atom

• the number of atoms in the molecule

Which of the following molecules contains one or more polar covalent bonds?

• KCl

• BaO

• H2S

• K2O

• BaCl2

The B-F bond in BF3 is

• polar covalent

• ionic

• nonpolar covalent

• pure covalent

Multiple bonds may form in molecules that contain carbon, nitrogen, or

• chlorine

• hydrogen

• oxygen

• Helium

Compared with nonmetals, the number of valence electrons in metals is generally

• smaller

• greater

• about the same

• almost triple that of nonmetals

Which bond is the strongest between 2 atoms?

• single bond

• double bond

• triple bond

• all the same

What is the proper delta notation for the Br – P bond in PBr₃?

• Br: δ+, P: δ−

• Br: δ−, P: δ+

• not applicable

The electrons involved in the formation of a chemical bond are called

• dipoles

• electrons

• Lewis electrons

• valence electrons

The pair of elements that forms a bond with the least ionic character is

• Na and Cl

• H and Cl

• O and Cl

• Br and Cl