Particle Theory of Matter
What does the Particle Theory say all matter is made of?
Tiny particles
What charge does a neutron have?
No charge (0), neutral
Which of the following is a physical property: colour, rusting, or burning?
Colour.
When you add oil to water, the oil will float on top. This tells you that oil is less ________ than water.
Dense
If we dissolve kool-aid powder in water, would the kool-aid powder be the solute or solvent?
Solute
True or false: When particles are heated they move closer together.
False
What are the three main particles found in an atom?
Protons, neutrons, and electrons
Give one example of a qualitative physical property.
Colour, texture, lustre etc...
If an object’s density is greater than water (1.0 g/cm³), will it float or sink?
Sink
A solution becomes __________ when it contains the maximum amount of solute that can dissolve at that temperature.
saturated
Which state of matter has the greatest distance between particles?
Gas
Electrons are found on these.
Orbits
True or false: Flammability is a physical property.
False. It is chemical.
mL and cm³ are both units of _______.
Volume
Adding _________ will allow more solute to dissolve.
Heat
A student sprays perfume into a room. The perfume very quickly fills the room. What can you infer about the temperature of the room?
It must be warm, this causes the particles to move quickly and spread out faster.
Helium is the second element on the periodic table. How many protons must helium have?
2
Knowing which of these physical properties would best help you identify an unknown liquid - the mass, density, or shape?
Density, because it’s unique to each substance and can help identify it.
What is the formula for Density?
Density = mass / volume
If a solution is unsaturated, what will happen when you add more solute?
The new solute will dissolve because the solution can still hold more.
Why does a balloon get smaller when placed in a freezer?
The air particles inside lose energy, move slower, and get closer together, reducing pressure and volume.
Which element has 1 proton?
Hydrogen (first on the periodic table!)
Why is solubility considered a physical property?
Because a substance dissolving doesn’t change its identity or chemical makeup.
If an object has a mass of 10 g and a volume of 2 cm³, what is its density?
5 g/ cm3
Two students are making lemonade. Student A stirs slowly with cold water; Student B stirs quickly with warm water. Whose sugar dissolves faster and why?
Student B’s - warm water and faster stirring increase particle motion, speeding up dissolving.