Depends, but it is probably electron
an electron
electrons
Electrons.
Hydrogen is the lightest element. The isotope protium is the lightest kind of hydrogen atom.
In the atom the electron is the lightest.
In the atom the electron is the lightest.
The Nucleus. Which is inside the electron clouds.
That depends on the atom you are refering to. Hydrogen is the lightest, heavy metals like uranium are a few hundred times heavyer.
Hydrogen is the lightest element. The isotope protium is the lightest kind of hydrogen atom.
hydrogen
least - electron most - the top quark
Hydrogen is the lightest and most common atom in the universe. It has the symbol H and an atomic number of 1.
electrons
The lightest particle in the atom is the electron.
An atom is composed of three main particles, the proton, electron and neutron. The electron is the lightest among the three.
Hydrogen is the lightest chemical element; the chemical symbol is H.
No, the nucleus is part of the atom.
In the atom the electron is the lightest.
The electron.
In the atom the electron is the lightest.