Particle Theory and Classifications of Matter
The smallest particles that still have unique properties and cannot be split any smaller has been given this name.
What is an atom?
A substance changes colour and produces gas when mixed. This is an example of this type of change.
What is a chemical change?
This is the difference between heat and temperature.
Heat = energy transfer; temperature = particle motion
The formula for density is this.
What is d = m/V?
The forces between particles are relatively weak for this state of matter.
What is a gas?
Mixing two clear and colourless liquids gives a bright yellow and opaque liquid, which hints at this type of change.
What is a chemical change?
This happens to particle motion as temperature increases.
What is increases?
A substance has a mass of 45 g and a volume of 15 mL. Calculate its density, including units.
What is 3 g/mL?
This state of matter has a fixed volume but no fixed shape.
What is a liquid?
Density = 4 g/mL, Volume = 25 mL. The mass is this.
What is 100 g?
This state of matter has particles that only vibrate in place.
What is a solid?
Metal feels colder than wood at the same temperature due to this.
Metal conducts heat away faster.
Cutting paper is an example of this type of change.
What is physical?
12 g of solute is in a total of 150 mL of solution. This is the concentration in % m/V.
What is 8% m/V?
This is the reason gases can be compressed, but solids cannot.
What are large spaces between gas particles?
This is the term for a solid that forms during a chemical change.
What is a precipitate?
A solid dissolves completely in water. This is an example of this type of change.
What is a physical change?
A student dissolves 20 g of solute in 200 mL of water.
The solution heats up slightly. Calculate % m/V.
What is 10% m/V?