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Red Dwarfs
Alpha, beta, gamma
Hydrogen is the least massive element. It is found in group 1, period 1 on the periodic table.
least - electron most - the top quark
The Galilean moons of Jupiter are (from most massive to least massive) Io, Europa, Ganymede, and Callisto.
Red Dwarfs
Mercury is the smallest and the least massive planet, out of the eight in our solar system.
Mercury
The element hydrogen is least massive as it has only one proton, one electron.
The least massive principle atomic particle is the electron. Neutrons and protons are much more massive and are about equal in mass. Of course, there are even smaller particles such as quarks which are less massive than even electrons.
electron
Mercury is the least massive of all the planets. The least massive planet is Mercury (0.055 Earths). However, the planet with the weakest gravity is Mars. I am of course not treating Pluto as a Planet (as it is no longer categorized as a planet), if I were to count Pluto then it would be the least massive ( 0.0021 Earths).
Alpha, beta, gamma
Your brain -------->everything else that exists------------> my wang
red
Hydrogen is the least massive element. It is found in group 1, period 1 on the periodic table.
least - electron most - the top quark