Hydrogen. It is the lightest element in the known universe.
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the lightest
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Lithium
Helium is the second lightest element and the second most abundant element in the observable universe.
Hydrogen! It's the lightest of the elements, the only element whose atoms (typically) contain no neutrons, and it's the most abundant element in the universe because it's the main ingredient in stars, which make up nearly all the universe's mass (as far as we know.)
Lithium is the lightest metallic element. Its atomic weight is 6.491.
hydrogen.
Hydrogen
The lightest and most abundant element in the entire Universe is hydrogen. Hydrogen has an atomic mass of nearly one.
hydrogen
Lithium!
a couler less gas that burns easily and is the lightest element of the universe
No, it is a colorless, highly flammable gaseous element, the lightest of all gases and the most abundant element in the universe.
Helium is the second lightest element and the second most abundant element in the observable universe.
Hydrogen is the lightest of all elements and is extremely flammable. It is also the most plentiful gas in the universe.
Hydrogen, the most common element in the universe.
No hydrogen is the lightest element.
Hydrogen! It's the lightest of the elements, the only element whose atoms (typically) contain no neutrons, and it's the most abundant element in the universe because it's the main ingredient in stars, which make up nearly all the universe's mass (as far as we know.)
It is highly flammable, it is the lightest of all gases and it is the most abundant element in the universe.
Hydrogen is the lightest element.