Types of Substances

Question 1

What is a Pure Substance

Answer 1

A substance that has the

same chemical make-up throughout

Question 2

What is a element

Answer 2

A pure substance that
cannot be changed into simpler
substances because they are
composed of one kind of atom

Question 3

What is a compound ?

Answer 3

A pure substance that is
composed of two or more atoms that
are chemically combined. They can
only be changed into simpler
substances by chemical changes.

Question 4

What is a Subscript?

Answer 4

In a chemical formula, the
subscript shows how many of each kind
of atom are in the compound.
- If no subscript is present, there is only one
atom of that element in the compound.

Question 5

What is coefficient?

Answer 5

Number that comes
before the chemical formula and
indicates the number of particles
that participate in the reaction.

Question 6

What is a mixture ?

Answer 6

Mixtures are composed of
two or more different substances
that retain their own individual
properties and are combined
physically (mixed together)

Question 7

What is a Heterogeneous Mixture ?

Answer 7

a mixture that is not
uniform throughout and the
component substances can be
visibly distinguished.

Question 8

Homogeneous Mixture

Answer 8

Also known as a solution,
is uniform throughout and the
different substances are evenly
mixed and cannot be visibly
distinguished.