Calcium=Ca2+
Carbonate=(CO3)2-
Therefore it is composed of Calcium, Carbon and Oxygen.
The dispersed particles of a colloid exhibit brownian motion, in which they move in a chaotic manner without a discernible pattern. The brownian motion is the erratic random motion of particles that are suspended in a fluid which results to the collision of molecules moving fast in the fluid they are in.
Answer:
He changed more than one variable at a time
Explanation: