Question of molecular compounds?

Question

which types of atoms generally combine using covalent bonds?
is it non-metal atoms....?

4 properties of many molecular compounds?

Answer 1

1) Atoms that tends to form covalent bonds are those whose electronegativities differences are less than 1.7. Not necessarily metallic or not metallic atoms ("metallic" refering to the be a less electronegative atom)

2) Properties of Molecular compounds (it means with covalent bonds):

a) They tend to be non-polar substances.
b) Generally low soluble or not soluble in water
c) Tend to have lower melting and boiling points than ionic compounds.
d) They tend to form large molecules with high molecular masses (example organic compounds).

Good luck!

Answer 2

whilst an ionic compound is dissolved in H2O, it splits valuable and detrimental ions. whilst a molecular compound dissolves in H2O, the molecules separate from one yet another. whilst a molecular acid dissolves in H2O, the H+a million bonds with H2O forming H3O+a million ions and the detrimental ion. HC2H3O2 + H2O ? H3O+a million + C2H3O2-a million CaCl2 ? Ca+2 + 2 Cl-a million HCl + H2O ? H3O+a million + Cl-a million H3BO3+ 3H2O ? 3 H3O+a million + BO3 -3 AlCl3 ? Al+3 + 3 Cl-a million C12H22O11table sugar is a molecule NaCl ? Na+a million + Cl-a million CH3OH methyl alcohol is molecule H3PO4 + 3H2O ? 3 H3O+a million + PO4 -3

Answer 3

yes, non-metal elements generally bond covalently, but usually only with other non-metal elements;

for example

NaBr is ionic, but Br2 is covalent.