點解唔同既oxide有唔同既colour???
e.g.: 1. Magnesium oxide ribbon 既 oxide layer 係黑色,
用火燒出黎既 magnesium oxide 就係白色,
但係唔係 magnesium ion 同 oxide ion 都係 colourless 咩?
2. Copper(II)oxide 入面既係黑色,
Copper(II)sulphate‧5H2O 入面既 copper(II)ion 就係藍色,
但係唔係 hydrous copper(II)sulphate 入面既 copper(II)ion 係藍色,
同埋anhydrous copper(II)sulphate 入面既 copper(II)ion 係白色,
點解 copper(II)oxide 係黑色呢?