Here's the breakdown:
* Aluminum Oxide (Al₂O₃): Aluminum oxide is incredibly stable. It has a very high melting point (about 2045 °C or 3713 °F) and doesn't readily decompose at normal temperatures. To actually break it down, you'd need extremely high temperatures and/or very specific chemical reactions (like electrolysis).
* Copper(II) Oxide (CuO): Copper(II) oxide is also very stable. It decomposes at a much higher temperature than its melting point (1200 °C or 2192 °F). However, this decomposition is still a very difficult process to achieve. It requires temperatures above 1800 °C (3272 °F) in a controlled environment with specific conditions to break it down into copper metal and oxygen gas.
Key Takeaway: Both aluminum oxide and copper(II) oxide are highly stable compounds. You won't find them easily decomposing under typical conditions. You'd need extreme temperatures and/or specialized processes to achieve their decomposition.
