Yes, gold is a pure substance. It is composed of just the element Gold, and there are no other substances required for it to exist.
However, that being said, gold isn’t always a pure substance. In the article that follows, we’ll explain what a pure substance is, why gold qualifies, and why it sometimes doesn’t.
Why Is Gold A Pure Substance?
First, let’s talk about what a pure substance is.
A pure substance is one that is made up of one kind of building block. These building blocks are generally elements, or compounds.
If there are any other substances (elements, compounds, mixtures, molecules, anything), the substance cannot be considered a pure substance.
Next, let’s talk about what gold is.
Gold is an element.
An element is a substance that is in its simplest form. This means that the substance can’t be broken down into other substances, like water can be broken down into hydrogen and oxygen.
Because gold is an element, the substance exists without any other substances, and no other substances are needed for it to exist, gold is a pure substance.
That being said, the gold that we come across in the world is rarely pure gold.
Gold is a really soft substance. This makes it a really poor component in every day products.
To combat this hardness issue, other metals are mixed with the gold.
This really keeps “gold” jewelry from getting dented and dinged from normal wear.
But when the gold is no longer “pure,” the material can no longer be considered a pure substance.
Is Gold A Mixture?
The answer is, it depends.
If the sample of gold we are talking about contains no other substances, it would not be considered a mixture.
A mixture is a material that contains two or more difference substances that are not chemically bonded to each other.
If another metal was added to gold to make it harder, then the “gold” sample would be considered a mixture.
Is Gold A Homogeneous Mixture?
The answer is, again, it depends.
If we are talking about the element gold, just the atoms of gold and nothing else, then no, gold is not a homogeneous mixture.
A mixture requires more than one substance. A bunch of gold particles swirled around together is just gold.
However, if the gold has been combined with another metal, like most gold jewelry is made, then yes, the gold is likely a homogeneous mixture.
A homogeneous mixture is a mixture that is chemically consistent regardless of where the sample is taken. to make a good looking and consistent product, the gold and its additives are mixed pretty darn well. If the mixing wasn’t done well, the product wouldn’t look as good as it should and it could be damaged more easily.
Is Gold A Heterogeneous Mixture?
Yet again, the answer is…it depends.
As we’ve said, gold exists on its own as a pure substance. Unless other substances are introduced to gold, it is not a mixture.
But if substances are mixed in with gold, the classification as a homogeneous mixture or heterogeneous mixture really depends upon just how well the substances are mixed together.
A heterogeneous mixture is a mixture that is not chemically consistent throughout.
You could take a sample from one spot and then from another, and they would not be the same.
Gold jewelry is generally a homogeneous mixture, so it will look good and last a long time.
Gold could easily be a heterogeneous mixture if it was mixed with another substance, and just not mixed well.
This could happen in the commercial/industrial setting, and it could also happen out in nature. Gold is often found mixed in with other minerals.
These minerals and gold are not chemically bonded to each other, and can be separated.
But while they share a space, the substance of gold mixed with another mineral is probably a heterogeneous mixture.
Is Gold A Compound?
No, gold is not considered a compound.
A compound is formed when two or more different kinds of elements form chemical bonds to hold each other together.
When two atoms of the same element bond to each other (like oxygen, as an example), they are not considered a compound.
Gold is not bonded to any other element. Therefore, it is not a compound.
Is Gold An Element?
Yes, gold is an element.
Gold cannot be broken apart or down into any simpler substance, like we see with water or sugar.
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