Atomic Theory
What is the subatomic particle that has a neutral charge?
Neutron
What is the measurement of how much matter is in an object?
Mass
What is thermal conductivity?
The measurement of how well a substance move heat.
Describe the change in state and energy when something melts.
A solid becomes a liquid because energy is added.
What is the density of an object with a volume of 2 mL and a mass of 10 grams?
10g/2mL = 5g/mL
What is the overall charge of an atom with three protons and 3 electrons?
Neutral
Define weight.
Weight is the effect of gravity on an object.
Janet mixes baking soda into water to make a paste to clean the sink. Which physical property is represented?
Solubility
Describe the particle motion of a liquid.
The particle slide past each other.
What is the VOLUME of a cube that has a length of 6 m, a width of 2 m, and a height of 2 m?
Volume = 6m x 2m x 2m = 24m3
What is the overall charge of an atom with three protons and 4 electrons?
-1 charge
If a person travels to the Moon, where there is less gravity, how is their mass effected?
Mass stays the same on the Moon
Explain how density determines if an object sinks or floats.
Objects that are more dense than the water will sink.
Objects that are less dense compared to the water will float.
Describe the particle motion of a solid.
The particles are tightly packed and vibrating. They are still moving!!!
The density of liquid water is 1.0 g/mL. Cason dropped an object in that has a mass of 15 grams and a volume of 5mL. Will the object sink or float in the water?
15g/5mL = 3g/mL the object will sink
What subatomic particles make up the mass of an atom?
Protons and neutrons
If a person travels to Jupiter, where there is more gravity, how is their weight effected?
Weight increases.
Makayla is making hot chocolate and adds cocoa powder to water. Identify the solute, solvent, and solution.
Solute: Cocoa powder
Solvent: Hot water
Solution: Hot Cocoa
The beads should be moving around fast and in all directions, even spreading out of the container.
Calculate the density of a cube with a mass of 24 grams. The cube has a length of 3cm, a width of 2cm, and a height of 1cm.
Volume = 3cm x 2cm x 1cm = 6cm3
Density = 24g/6cm3 = 4.0 g/cm3
How is the atom composed? Where do we find each of the subatomic particles?
Protons in the nucleus
Neutrons in the nucleus
Electrons orbiting the nucleus
What property is effected by gravity?
Weight
If 10 mL of water boils at 100 degrees Celsius. What temperature will 100mL of water boil at? Explain why.
100 degrees Celsius because sample size does not change the boiling point. Boiling point is independent of sample size.
Looking at the picture, identify the states of matter in the model
Left: Solid
Middle: Liquid
Right: Gas
Calculate the density of an object with a mass of 60 grams. There is graduated cylinder with 100mL of water. When the object is added, the volume goes up to 130mL of water. Calculate the volume of the object. Then the density.
Volume = 130mL - 100mL =30mL
Density = 60g/30mL =2 g/mL