The lightest weight element that is not a gas at room temperature is lithium. It is a solid metal with a low density and atomic number 3.
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.
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.
Hydrogen is the lightest gas.
The lightest artificial isotope is hydrogen-3, also called "tritium". The lightest element that has no naturally occurring isotopes is technetium.