Covalent bonds

Hi, I'm currently learning about intermolecular forces and atomic radius, and this question has appeared:   Why does solid CO2 become a gas at room temperature, but SiO2 does not? 

Did I do this correctly?   in increasing order of percent ionic character: N-N, S-O, Cl-F, K-O, Li-F

Help me with covalent bonding please, :)

Energy of a covalent bond is approximated as: Vb (rij) =1/2 kijb [( rij-bij)]2 Calculate the force acting on atoms as a function of interatomic distance.

The experimental lattice enthalpy of a compound gets more exothermic than the theoretical lattice enthalpy of the compound if it has more covalent characteristics.This is because theoretical... more

Describe three differences between ionic and covalent bonds.

I have to draw a covalent bond between 2 Carbons, an Oxygen and Hydrogens

True or False, can a oxygen atoms form covalent bonds with up to four other atoms

identify the attractive and repulsive forces that cause the bond length between two bonded atoms to get longer and shorter as though on a spring.

if it takes one or more covalent bond for any atom to form, then I am confused with these answers.   a. one b. two c.  as many as it needs to fill its valance shell d.  there is no limit to... more

[xe] 6s power of 2 4fpower of 4