Answer: 21.5kg in grams is 21,500 grams
21.5kg in mg is 215,000,00
Explanation:
The Plum Pudding model of the atom was like a modernchocolate chip cookie it had subatomic particles embedded inside it in no particular arrangement
the gold foil experiment proved that there was a lot of empty space in an atom Because of the launched Particles.mostly deflected but some went through the foil
In my opinion the answer is D
The answer is gas only.
hope this helps!