Answer the following question:
When heated in air, a brown-coloured metal ‘X’ forms a black solid. Identify ‘X’ and the black solid formed.
The element ‘\(X\)’ is .
The black coloured compound is a .
The reaction included is \(2Cu\) + \(O_2\) → \(2CuO\)
Copper (brown) + → Copper oxide (black)
Copper (brown) + → Copper oxide (black)