Question

Which substance cannot be broken down by a chemical change?

1) ammonia
2) ethanol
3) propanol
4) zirconium

Answer 1

Zirconium

Step-by-step explanation:

This is because if you look it up in the periodic table you cannot break it apart by a chemical.

Answer 2

Zirconium cannot be broken down by a chemical change, because it is an element. The others are all molecules. Hope ive helped :)