Helium!
who are you have you ever looked at the periodic table of elements? Hydrogen is the lightest element while helium is the second lightest element. No.
Helium is heavier than hydrogen. Hydrogen is the lightest and simplest element in the periodic table, while helium is the second lightest element.
Hydrogen is the lightest gas.
Hydrogen is the lightest element. The isotope protium is the lightest kind of hydrogen atom.
hydrogen is the lightest element
Protium (Hydrogen-1) is the lightest and by far the most common isotope of hydrogen.
the lightest elements are gases and the lightest of these are hydrogen and helium.
hydrogen
No hydrogen is the lightest element.
Hydrogen was, and is, the lightest gas
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.
The lightest 'non-metal' could be Hydrogen and Helium! Both are gases, and therefore, not a metal.