What is the maximum number of electrons that can be in an energy level beyond the 1st?

How many ions that have a +1 charge will bond with an ion that has a -2 charge

Diffraction is when light is bent around obstructions. which of the these observation about clouds would indicate diffraction? a) after rain storms, you can sometimes see rainbows. b) clouds are white or gray and cannot be seen through. c) on a cloudy day, the temperature tends to be cooler than a sunny day. d) the edges of dark clouds appear lighter. this

Is this correct if not can u correct me