JAMB Physics 2013 Paper

Concept:Silicon and germanium are both group IV elements with four valence electrons, so they share electrons equally.Explanation:Silicon ($\mathrm{Si}$) and germanium ($\mathrm{Ge}$) are both tetravalent non-metals/metalloids.Each atom needs four more electrons to complete its octet.They achieve this by sharing valence electrons, forming covalent bonds.There is no complete electron transfer, so the bond is not ionic.No lone pair is donated to form a coordinate/dative bond.Answer:The bond between silicon and germanium is covalent bond.