Helium
The first element in the periodic table is hydrogen. It is the lightest and most abundant element in the universe.
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 is the lightest chemical element. It has an atomic number of 1 and is the most abundant element in the universe.
The lightest and most abundant element in the entire Universe is hydrogen. Hydrogen has an atomic mass of nearly one.
Hydrogen is not only the lightest but the only known element with only 1 proton per atom.
No hydrogen is the lightest element.
Yes, it is after helium the 2nd lightest noble gas.
Hydrogen is the lightest element.
hydrogen is the lightest element
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.
No, Hydrogen is lighter than Helium. However, Helium is the 2nd lightest element with an atomic number of 2.
Hydrogen. It is the lightest element in the known universe.
No, hydrogen is ?the lightest element in the periodic table.
The first element in the periodic table is hydrogen. It is the lightest and most abundant element in the universe.
The lightest element with only one proton is hydrogen.
Hydrogen is not only the lightest element of all, it is also very reactive.
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.