Question

Which substance can not be broken down by a chemical change? silicon propane ethane water

Answer 1

I think the answer is silicon :))

Answer 2

Answer:

$\huge \boxed{\mathrm{silicon}}$

Explanation:

Silicon cannot be broken down by any physical or chemical methods, because it is an element. It has properties of an element nor a compound or mixture.

Silicon is a chemical element with the symbol Si and atomic number 14.