What is the most common thing in the universe?

Answer 1

Yes, Water constitutes 70%.

But may you advise what you mean by the common substance on earth?

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water I'm pretty sure!

If the whole Earth is taken into consideration, iron (since it makes up most of the inner parts). If we only consider the part accessible to humankind, it would probably be nitrogen (which makes up more than 70 percent of the atmosphere).

However if you include the whole universe it would be Hydrogen because astronomers believe 90% of the universe is made of Hydrogen!!!!!!!!

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The total water on the surface of Earth makes up 0.025% of the mass of the planet-- 25/100000ths of the stuff of Earth.

For Example If Earth were the size of a Honda Odyssey minivan the amount of water on the planet would be in a single, half-liter bottle of Poland spring in one of the van's thirteen cup holders.

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Not correct. Perovskite is. Water covers 70%+ of the surface, but that's it.

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Oxygen.

Initially I thought it could be carbon, but upon further research, I have found that oxygen is the most abundant substance on earth, which exists in the atmosphere, water, and throughout earth's interior.

Answer 2

The most common compound is water. Its molecule is made up of two hydrogen atoms and one oxygen atom. Hydrogen is the most common atom in the universe, and oxygen is the thrid most common, so water has to be the number one compound.

The second most common atom? Helium - and it forms no compounds.

Is H2 not the most common compound in the universe?

No, H2 is an allotrope. A molecule needs to include at least two different elements to be considered a compound.

Answer 3

The most common matter in our universe is Dark Energy, which is what causes the universe to expand. It accounts for 73% of the visible universe followed by Dark Matter a form of matter that bends light, which accounts for 21% of the visible universe.

Answer 4

Plasma, and hydrogen is the most common element.

Answer 5

Almost all the atoms in the universe are either hydrogen or helium atoms.

Answer 6

i believe its water and oxygene(:

Answer 7

Why is it important to us ?