Pure Substances Check-in Review #1

What is true about pure substances?

• made up of one kind of particle
• can be physically separated into components
• always appear as solids at room temperature
• contain only a single type of molecule

What is true about elements?

• can be chemically broken into simpler substances.
• cannot be broken down into smaller parts
• always exist in liquid form

What is a compound?

• made up of one kind of particle
• made of two or more elements

What are solutions?

• are pure substances mixed together evenly
• made up of one kind of particle

What is true about solutions?

• made up of more than one kind of particle; can't see different parts
• each part is always visible separately
• they are always liquids

What is true about mechanical mixtures?

• allows you to see the different parts
• they only exist in solid form
• you cannot see the different parts
• cannot be separated

What is true about mixtures?

• a substance that is made up of one kind of particle
• a substance that contains more than one kind of particle

What is NOT true about solvents?

• the largest part of the solution
• only one solvent
• the part of a solution that does the dissolving
• the part of the solution that gets dissolved

What is NOT true about solutes?

• can be many solutes
• the part of the solution that gets dissolved
• the largest part of the solution
• the smallest part of the sollutions

What is water important in solutes and solvents?

• water is only a solvent at high temperatures
• water dissolves all substances, no matter what
• water actually isn't important at all
• water dissolves more solutes than any other solvent