4. Molecular Compounds

How many bonds and nonbonding electrons can be found around Si atoms?

How many bonds and lone pairs can be found around Mg atoms?

a) 2, 1                    b) 2, 0                    c) 3, 1                     d) 3, 0

What are likely formulas for the following molecules?

a. CH₂Cl_?

b. BH_?

c. NI_?

d. SiCl_?

The discovery in the 1960s that xenon and fluorine react to form a molecular compound was a surprise to most chemists, because it had been thought that noble gases could not form bonds.

a. Why was it thought that noble gases could not form bonds?

The following formulas are unlikely to be correct. What is wrong with each?

d. C₂OS