The correct answer is: A. amorphous character.
White phosphorus is a non-metallic, waxy solid that is naturally occurring. It is a member of the phosphorus group, which also includes red phosphorus, black phosphorus, and violet phosphorus. White phosphorus is highly flammable and can spontaneously ignite when exposed to air. It is also toxic and can cause skin burns and other health problems.
White phosphorus glows in the dark due to its amorphous character. Amorphous materials do not have a regular crystal structure, which means that their atoms are arranged in a disordered way. This disordered arrangement allows for the movement of electrons, which in turn produces light.
The other options are incorrect for the following reasons:
- Option B: Slow oxidation is not the reason why white phosphorus glows in the dark. White phosphorus is a highly reactive material and will oxidize rapidly when exposed to air. This oxidation process does not produce light.
- Option C: High ignition temperature is not the reason why white phosphorus glows in the dark. White phosphorus has a relatively low ignition temperature of 40 degrees Celsius. This means that it can ignite spontaneously when exposed to heat or friction. However, the ignition process does not produce light.
- Option D: Good conducting property of electricity is not the reason why white phosphorus glows in the dark. White phosphorus is a poor conductor of electricity. This means that it does not produce light when an electric current is passed through it.