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 mass of an atom is determined by the amount of protons and neutrons in the nucleus. Since sodium has 11 protons and 11 neutrons and neon has 10 protons and 10 neutrons, so â¦ dium has a larger mass. 2 people found this useful. Gaines Fox.