This is a group of protons and neutrons in the center of all atoms.

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

The atomic number, or number, is the described as the number of in the nucleus of an chemical element.

How do you know when a chemical reaction has occurred