Silica is not an element. It is a compound made up of both silicon and oxygen.
Answer:
Diatomic molecules are molecules composed of only two atoms, of the same or different chemical elements. The prefix di- is of Greek origin, meaning "two". If a diatomic molecule consists of two atoms of the same element, such as hydrogen (H2) or oxygen (O2), then it is said to be homonuclear.
Explanation:
I did it before
Answer:
D. A boulder falling off a tall cliff
Explanation:
The boulders potential energy transforms to kinetic energy as the boulder falls.
A) <span>Particles need to collide in order to react</span>
