Explain why the nucleus of an atom is positively charged but the overall charge of an atom is neutral

What elements have 2 electrons inthe 4s sublevel

Why is silver chloride is an ionic compound

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