Answer:
ionic compound
Explanation:
that is the answer if you meant what type of compound.
Answer: If the light ray hits the boundary at an angle which is not perpendicular to or parallel to the surface, then it will change direction and appear to `bend'
Hope This Helps You! :D
Answer:
it can occur between hydrogen and 3 other elements
Explanation:
These elements are:
Nitrogen
Oxygen
Flourine
It moves to a higher energy level<span />
