By chemical methods, such as electrolysis.
Neither, because they don't get broken down at all they are one of itself. It isn't made into 2 types of substances. Only compounds get broken down chemically,
atoms
a pure substance only has one element and a mixture has many different compounds
Combination
Chemical compounds.
yes, they can only be broken down by chemical means
yes, they can only be broken down by chemical means
Yes, only elements cannot be broken down to smaller substances.
Neither, because they don't get broken down at all they are one of itself. It isn't made into 2 types of substances. Only compounds get broken down chemically,
You misunderstand!!!! a compound is broken down into its elemental atoms.
In the appropriate situation, all compounds are broken down into simpler substances.
atoms
a pure substance only has one element and a mixture has many different compounds
Some compounds fall apart when heated. This is because the molecules breakdown with the added heat. Ionic compounds are an example of those that fall apart.
Combination
Copper is an element because it cannot be broken down past it's state of being copper. All compounds can pretty much be broken apart or separated, but elements are unable to be separated. Therefore, copper is an element.
Quarks and anti-quarks