D, you can't see ultraviolet rays and other similar frequency waves with the naked eye.
H-Cl pair of atoms has the most polar bond.
i think it would be Earth's albedo hope this helps
Answer:
All elements in the same group of the periodic table have the same number of valence electrons. This made it possible to compare the valence of the alien elements to the valence of elements from our periodic table, and match the alien elements to the correct group. For example, our group 14 elements all have 4 valence electrons, so the alien element with 4 valence electrons had to be part of group 14 also.
