Describe ionic and covalent bonding?

Ionic bonding involves one element (usually a nonmetal) with a high electronegativity completely removing on valence electron from another element (usually a metal) with a low electronegativity. This causes the one that gained the electron to become negatively charged and the other to become positively charged. The positive and negative charges then attract which creates the bond. Covalent bond is usually between two nonmetals and is caused by the sharing (rather then transferring) of electrons