Pure Substances: Elements and Compounds

Front

What is a pure substance?

Back

A pure substance is a material that has a constant composition and consistent properties throughout. It can be an element or a compound.

Front

How many total elements are in the chemical formula of CHN3Au?

Back

4

Front

What type of substance is H2SO4?

Back

H2SO4 is a compound.

Front

What is the periodic table of elements?

Back

The periodic table of elements is a tabular arrangement of chemical elements, organized by their atomic number, electron configuration, and recurring chemical properties.

Front

Which substances can be separated chemically?

Back

Compounds only can be separated chemically.

Front

What is the difference between an element and a compound?

Back

An element is a pure substance that cannot be broken down into simpler substances by chemical means, while a compound is a substance formed when two or more elements are chemically bonded together.

Front

Give an example of a compound.

Back

H2SO4 (sulfuric acid) is an example of a compound.

Front

What is the chemical formula for sulfuric acid?

Back

The chemical formula for sulfuric acid is H2SO4.

Front

Can elements be separated into simpler substances?

Back

No, elements cannot be separated into simpler substances by chemical means.

Front

What are the two main categories of pure substances?

Back

The two main categories of pure substances are elements and compounds.