Atomic radius generally decreases as we move . down a group and from right to left across a period up a group and from left to right across a period down a group and from left to right across a period up a group and from right to left across a period down a group; the period position has no effect

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