How many chloride ions are needed to cancel the 2+ charge of magnesium in magnesium chloride?

Based on its chemical properties, identify the position of each chemical family on the periodic table.

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

Which electron configuration represents the electrons in an atom of sodium in the ground state at stp