B is the right answer "right"
C is the answer because he wants to know if less force is needed to pull on a slippery surface which reduces friction
Moseley established a more accurate periodic table by closer determination of atomic numbers. Through the results of his measurements of the wavelengths of the X-ray spectral lines of a number of elements which showed that the ordering of the elements by atomic number.
Two electrons that are of the same charge will repel each other
