The lightest element with only one proton is hydrogen.
Hydrogen is the lightest element.
Hydrogen is not only the lightest but the only known element with only 1 proton per atom.
That would be hydrogen!!
The lightest element of all should have the lightest atomic mass. It is hydrogen-1 isotope. This atom has only one proton and no neutrons.
Hydrogen.
Hydrogen is the lightest element. The isotope protium is the lightest kind of hydrogen atom.
hydrogen has only one proton and one electron. it is the lightest element and is a pure element, which means hydrogen is made of one type of atom (in this case hydrogen atoms)
Hydrogen ion is the only element that has no neutron and one proton. That is why it is basically a proton.
Hydrogen is the simplest, lightest element. It normally occurs as "protium", the atom having one proton and one electron.
Hydrogen.
The only element that has one proton and no neutrons is a hydrogen atom.
Hydrogen (atomic number 1) typically only has a single proton in its nucleus.