Which substance cannot be broken down by a chemical change? a) butanal b) propene c) gold d) water

C) Gold

Explanation:

Element is a pure substance which is composed of atoms of similar elements.It can not be decomposed into simpler constituents using chemical reactions.Example: Gold

Compound is a pure substance which is made from atoms of different elements combined together in a fixed ratio by mass. It can be decomposed into simpler constituents using chemical reactions. Example: water , butanal , and propene

For example:

Thus the element gold can not be broken down by a chemical change.

thats a little if u want the answer just look it up on google thats what i do haha : )

the positions which points up in upward carbon and down in downward carbon are axial

and vice versa holds true for equatorial positions

so the correct answer with labelled diagram will be