Question

Which of thefollowing is not elelment
1 grapite
2 germanium
3 silica
3 silicon

Answer 1

Silica is not an element. Graphite is an allotrope of carbon. Germanium(Ge) is a lustrous mettaloid. Silicon (Si) is a non- metal.

However, silica is not an element. It is a common form of silicon dioxide.