Atoms bond using only the electrons in their (valence electrons)​

the correct answer, according to e2020, is the second choice there is an occluded front in region a and a cold front in region b.

the supermassive black hole is in the middle of the galaxy.

one part of the electromagnetic spectrum that arrives on earth as solar radiation from the sun is the visible spectrum. wavelengths of the visible spectrum combine to form what we refer to as

answer - d) ultraviolet radiation.

violet /   380–450 nm / 668–789 thz

violet is number 1 in the chart of visible light.