Explanation:
Method of prepration of sodium thiosulphate - definition
In the laboratory, this salt can be prepared by heating an aqueous solution of sodium sulphite with sulphur or by boiling aqueous NaOH and sulfur according to this equation:

Answer:
As nouns the difference between impression and imprint
is that impression is the indentation or depression made by the pressure of one object on or into another while imprint is an impression; the mark left behind by printing something.
Atoms return to their ground state by emitting a photon of light.
I believe it is D. They can contain different types of atom the can contain different type of arms and molecule
Answer: 2 atoms
Explanation: 2 in Co2 means 2 atoms