An Electron.
Hydrogen is the lightest and most common atom in the universe. It has the symbol H and an atomic number of 1.
The lightest element known is hydrogen. It is the first element in the periodic table and has an atomic number of 1, making it the simplest and lightest element in the universe.
electrons the smallest but weigh as much as protons neutrons weigh nothing ~Kay
The electron is the lightest particle in the list. A proton is 1836 times more massive than an electron. Neutrons are just slightly more massive than a proton, and an alpha particle consists of two protons and two neutrons.
The most massive elementary particle known to exist in the universe is the top quark.
Hydrogen. It is the lightest element in the known universe.
The lightest subatomic particle is the electron.
The lightest and most abundant element in the entire Universe is hydrogen. Hydrogen has an atomic mass of nearly one.
Yes it is, and it's also the lightest gas in the universe.
Protons are positively charged but are not the lightest. They are about 2000 times the weight of electrons.
Lithium!
hydrogen
In the atom the electron is the lightest.
The lightest particle in the atom is the electron.
Hydrogen is the lightest and most common atom in the universe. It has the symbol H and an atomic number of 1.
The electron is the lightest particle in the atom.
In our known universe, hydrogen then helium. But this may change with further exploration.