active transport requires the usage of energy in the form of ATP to  move something against is concentration gradient. Facilitated  diffusion is a form of simple diffusion i â¦ n that the substance moves  along with its concentration gradient, but it requires the use of a  transport protein.
Quick Answer. The atomic mass of the element neon is 20.18 amu, or atomic mass units. This number, which appears on the periodic table underneath the chemical symbol for neon, Ne, represents the weighted average of the isotopic masses of neon's isotopes based on their abundance in nature. Continue Reading.
The atomic number is the number that indicates the number of protons (or electrons) of an element. The atomic mass is on account of the mass of proton and nutron of an atom. The mass of nutron , proton and electrons are 1.67493*10^-(27) 1.67262*10^(-27) kg and 9.10939*10^(-31) kg. The mass of the electron is negligible compared to that of nutron anor proton. The nutron is slightly more mass than that of proton.