Answer:
Solid metals are appeared shiny as metals have plenty of free electrons.
Option: D
Step-by-step explanation:
The surface of solid metals appear shiny, this is because elements consists of small atoms which has electrons, neutrons and protons in metals the electrons are distant from the nucleus hence, metals appear shiny.
When a bunch of metal atoms come together in a group, these outer electrons move side to side with small rapid movements. Light bounces or reflects these electrons and makes it look shiny.