To find the atomic mass (atomic weight) of an atom you need to
a. how many protons are in the atom
b. how many neutrons are in the atom
c. the average number of protons and neutrons of all like substances on earth (example- silver)
d. the chemical symbol, using letters

Which statement is true about the part of the electromagnetic spectrum that human eyes can detect? it contains only the colors of the rainbow and television waves. o it is divided into seven ranges of wavelengths. it contains ultraviolet, visible, and infrared light. it is divided into nine ranges of wavelengths.

Which type of orbits are found in the principal energy level n = 2 a - s b - s, f c - s, d d - s, p e - s, p, d

How do scientists think that gravity affected the formation of our solar system?