Page 24 - classification of elements

Differences between ionic and covalent compound

• Ionic compound • Covalent compound

• They are formed by complete transfer of • They are formed by sharing of electrons

electrons from metals to non-metals between non-metals

• They have high melting and boiling points. • They have low melting and boiling points.

• They are water soluble. • They may not be water soluble.

• They conduct electricity in solution state. • They do not conduct electricity in solution

• e.g NaCl , MgO , CaCl 2 state.

• e.g H O, CH , CO HCl
2,
4
2