1) which kind of bond is present in a substance that conducts electricity only when it is melted or when it is dissolved in water?
a. van der waals forces
b. metallic
c. polar covalent
d. ionic
2) Which element has luster, is ductile, and is malleable at room temperature?
a. bromine
b. palladium
c. sulfur
d. xenon
3) which chloride compound shows the greatest covalent bond character?
a. AlCl3
b. LiCl
c. MgCl2
d. SCl2
4) What is the number of molecules in 4.4 g of carbon dioxide, CO2?
a. 6x10^24
b. 6x10^23
c. 6x10^22
d. 1x10^22