SCIENCE PACE 1063

An element is a _ substance that is not chemically combined with any other elements.

• valuable

• pure

• rare

An element _ be divided into other substances or elements.

• can

• cannot

Each element was given a name and a _ to stand for that element.

• chemical

• rank

• symbol

Scientists have either discovered or produced 118 total _.

• compounds

• elements

• solutions

In a solution _ substances can no longer be seen.

• separate

• combined

• liquid

A substance that will not readily dissolve in a solvent is said to be _ in that solvent.

• invisible

• indivisible

• insoluble

A diluted solution is a _ solution.

• strong

• weak

• salty

A _ solution is a strong solution.

• concentrated

• diluted

• dark

Supersaturated solutions are only formed by _ or pressure.

• heat

• light

• cold

In a chemical reaction, a _ substance is formed.

• new

• changed

• mixture