Select all cases in which the units comprising the solid are best classified as molecules.

Question

CrSe

C2H2

CS2

C2H4

Cs2S

Cl2O7

None

Help please? I think they're all molecules

Answer 1

I would refer to a table of electonegativity, and determine the predominant bonding. Covalent bonds make molecules.

http://www.cliffsnotes.com/study_guide/Polar-Bonds.topicArticleId-21729,articleId-21679.html

Answer 2

does that mean covalent bonds make molecules so there for

C2H2
CS2
C2H4
Cl2O7

are the right answer