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What is the definition of impure substances?
Substances that are not pure.
Are most substances around us pure substances ao mixture?
There are very few pure substances around us. Most substances are mixtures, or compounds.
What substances combine without a chemical reaction?
These substances are called reactants.
Are all substances are elements?
Yes my friends. All elements are pure substances that cannot be broken down. However, pure substances aren't all elements.
Does pure substances have a fixed composition?
No. The nobel gases and the rare earth metals (gold, platinum) occur as pure substances in nature because they are relatively unreactive. Most materials do not occur as pure substances (typically oxidized) and must be treated to be made pure.
Two or more substances that are together but do combine to form a new pure substance?
mixture
What kind of pure substances forms when two elements chemically combine?
This is called a compound.
When two pure substances are combined so that each of the pure substance retains its own properties the result is a?
When two substances combine and retain their own properties, a mixture results.
What are compounds composed of?
Compounds are pure substances formed when two or more different elements combine.
Is a pure substance Whose smallest unit is made of more than one element?
two or more substances that are together that are together but do not combine to form a new, pure substance
What are two or more substances that are together but do not combine to form a new pure substance?
A mixture forms when two or more substances combine physically but not chemically.
What can pure substances be classified as?
Pure substances are divided into elements and compounds.
Are elements pure substances or mixed substances?
pure are you dumb or something
What causes substances to combine in different ways to make other substances?
A chemical reaction causes substances to combine in different ways to make other substances.
When substances combine to form a compound what happens to the original properties of the substances?
When substances combine and retain their own properties, the result is a mixture.
How many substances are pure substances?
Practically (exceptions exist) all known substances can be obtained in a pure fom.
What is the definition of impure substances?
Substances that are not pure.
