Categorize each phrase below as being relevant to ionic bonding, covalent bonding or metallic bonding. 1. electron transfer 2. Nonmetal with nonmetal 3. Alloy 4. separate molecules 5. metal with metal 6. electron-sea model 7. electron pooling 8. metal with nonmetal 9. electron sharing 10. molecular formula 11. empirical formula 12. three-dimensional array