Both are elements.
Hydrogen (symbol, H) belongs to group 1, has one proton and one electron and is highly reactive element. Hydrogen exists as a diatomic gas (H2).
Helium (symbol, He) belongs to group 8, has 2 protons and 2 electrons and is chemically inert as it has completely filled orbitals. Helium exists as mono atomic element.
Stars contain hydrogen, helium and a little iron.
Hydrogen is the most common element in the universe as a whole; about 75% of the universe by mass is hydrogen (since hydrogen is also the lightest element, that means that the percentage by number of atoms is even higher) . Helium is second; oxygen is a fairly distant third.
Hydrogen and Helium
Hydrogen and helium are both present in significant amounts in the universe. They are also both light gases that have low atomic masses.
The common elements of Saturn is Hydrogen and Helium. Saturn's powerful gravitational pull and atmospheric pressure allows Hydrogen and Helium to exist as a liquid around its core. In addition to being liquids most of its atmosphere is Hydrogen and Helium with Ammonia being the source of its yellow coloration.
The two common elements found in the sun are Hydrogen and Helium.
Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.
Stars contain hydrogen, helium and a little iron.
The two most common ones are hydrogen and helium gas
Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.Hydrogen and helium, the most common elements in the Universe.
Hydrogen is the most common element in the universe as a whole; about 75% of the universe by mass is hydrogen (since hydrogen is also the lightest element, that means that the percentage by number of atoms is even higher) . Helium is second; oxygen is a fairly distant third.
helium and hydrogen
Hydrogen and Helium
Hydrogen and helium.
Hydrogen and helium.
Hydrogen, helium.
They are not, the most common elements are Hydrogen and Helium.