Yes, hydrogen is a pure substance.
Why Is Hydrogen A Pure Substance?
A pure substance is any substance which is made up of only one kind of building block.
That building block can be an element (such as Iron, Gold, or Oxygen).
That element can also be a compound, such as carbon dioxide.
In the case of hydrogen, or even hydrogen gas (which is usually two hydrogen atoms bonded to each other), the material is made up of only one kind of building block.
Because there are no other substances needed or bonded to hydrogen to make it what it is, hydrogen is considered a pure substance.
Is Hydrogen An Element (And Why?)
Yes, hydrogen is an element.
Any element is any substance which cannot be broken down or apart into other substances, or more simple substances.
A good example of an element is gold. Gold it not connected or linked or mixed with any other substance for it to be gold.
A good example of a material which is not an element is water. Water is made when hydrogen and oxygen attach to each other with bonds. These bonds can be broken, and the hydrogen and oxygen again become separate substances.
Hydrogen is an element because you cannot break hydrogen down into simpler substances. If you try and break hydrogen apart, you’ll simply be tearing apart the internal structure of the hydrogen atom (protons, electrons and such). You aren’t breaking it apart into is constituent substance parts, like water.
Is Hydrogen A Compound (and Why?)
No, hydrogen is not a compound.
A compound is formed when two or more different kinds of substances become bonded to each other.
A good example of a compound is salt, which has the chemical formula NaCl. Salt forms when sodium and chlorine bond to each other.
Since hydrogen exists as hydrogen without the need to form any other bonds, it is not a compound.
Is Hydrogen Gas A Compound?
No, hydrogen gas is not a compound.
As we discussed above, a compound is formed when two or more different substances bond to each other.
In the case of hydrogen gas, two atoms of the same substance bond to each other to form hydrogen gas. Hydrogen….and hydrogen.
We call diatomic hydrogen a molecule, rather than an atom, because there are two atoms bonded to each other. But since the atoms are the same element, it cannot be called a compound.
Is Hydrogen Gas A Pure Substance?
Yes, hydrogen gas is considered a pure substance.
As noted above, a pure substance is one that is formed with only one kind of building block, an element or a compound.
Hydrogen, either the element or the diatomic gas formed when two hydrogen atoms bond to each other, only contains hydrogen.
There’s no other substances, and no other building blocks.
As a result, hydrogen gas is considered a pure substance.
Is Hydrogen a Mixture?
No, hydrogen is not a mixture.
A material is considered a mixture when two or more different substances are found to be in the same physical space or area, but are not chemically bonded to each other.
They can be separated into their constituent parts without the need to break any bonds.
A good example of a mixture is beach sand, because sand is made up of tiny particles of many different rocks and minerals.
Those rocks and mineral granules are not bonded to each other, and can be separated out from each other.
Hydrogen is an element, and it exists as an element without having to add any other substance or material to it, bonded or not.
Because hydrogen as a substance is not composed of different substances that are not bonded together, it is not a mixture.
Diatomic hydrogen (hydrogen gas) is also not a mixture. Hydrogen has is formed when two hydrogen atoms bond to each other.
Diatomic hydrogen cannot be a mixture either, because the two atoms are the same substance and they are bonded to each other.
Is Hydrogen a Homogeneous Mixture?
No, hydrogen is not a homogeneous mixture.
A mixture is a material composed of two or more different substances, where the substances are not bonded to each other.
A homogeneous mixture is a mixture that is chemically consistent throughout the material.
This means that if you took a sample from one area, it would the same as another sample taken from somewhere else.
Hydrogen is an element, and is composed of only hydrogen.
It does not contain more than one substance.
Therefore, it cannot be a mixture.
And the question of whether it is a homogeneous mixture or not is a moot point.
Is Hydrogen a Heterogeneous Mixture?
No, hydrogen is not a heterogeneous mixture.
A mixture is considered heterogeneous if the composition of the material is not consistent throughout.
This means that if you took a sample from one area, it would be different from a sample in another area.
In the case of hydrogen, there are no other substances. So if you took a sample from one area, it would be chemically the same as a sample from another area.
Not to mention the fact that (as we’ve said a few times above), hydrogen is not a mixture.
Interested in learning more about pure substances and mixtures? Or whether materials like water, grape juice, beer, milk, coffee, salt, motor oil, oxygen, brick, or baking soda are considered pure substances or mixtures?
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