What is the reason for the emission of light after the gas in a discharge tube is excited?

Explain in detail of the four major scientific developments that spurred the formulation of the plate tectonics theory

The atom fluorine generally will become stable through the formation of an ionic chemical compound by accepting electron(s) from another atom. this process will fill its outer energy level of electrons.

Maya wrote if you step to describe how carbon circulates between the atmosphere and living organisms