Periodic Table
Density
Phase Changes
Atoms
Labs
100
What is the name, atomic number, and symbol of the following element?
Name: Iron
Atomic Number: 26
Symbol: Fe
100
How would you describe density?
The measure of how compact a substance is
100
Going from a solid to a liquid is ___________
melting
100
What charge to protons have?
Postive
100
What causes the water to condense after boiling?
The water vapor cools and the attraction overcomes the kinetic energy
200
What does an atoms "atomic number" determine?
The amount of protons
200
What are the two different units you can use for the density of an object?
g/cm3 and g/mL
200
Going from a liquid to a gas is ____________
vaporization or evaporation
200
How would you describe atomic movement in a liquid?
Molecules moving around each other
200
What caused the frost on the outside of the can?
The temperature of the water/salt inside the can is below waters normal freezing temperature. Water vapor in the air changed phase as a result.
300
What pattern does density follow in the columns on the periodic table?
Increases going down
300
What the density of an object that has a mass of 30 grams and a volume of 5 mL?
6 g/mL
300
Why doesn't temperature steadily increase as energy is added?
Energy is required to break the bonds between atoms during a phase change
300
If oxygen has eight protons we can assume it has ___ neutrons and ____ electrons
eight protons and eight electrons
300
What caused each liquid to evaporate at different rates when placed on a paper towel?
The attraction strength between each atom
400
What is an element?
A substance comprised entirely of the same type of atoms
400
What is the mass of an object that has a density of 6 g/cm3 and a volume of 7 cm3?
42 g
400
What determines whether or not a phase change will take place?
The interaction between the atoms attraction and temperature.
(Pressure also plays a role)
400
Describe the location and movement of each subatomic particle
Protons and neutrons in the nucleus
Electrons orbiting the nucleus
400
What tank has the highest kinetic energy?
Tank 1
500
What pattern does density follow in the rows on the periodic table?
Bell curve (highest in the middle)
500
What is the density of a liquid that has a volume of 0.5 Liters and a mass of 1,000 grams?
(1 Liter = 1,000 mL)
2 g/mL
500
A phase change directly from a solid to a gas is ____________
sublimation
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500
What causes atoms to be attracted to each other?
The opposite charges of protons and electrons
500
Why does the food coloring spread throughout the water with the ice?
As the ice melts, colder water moves towards the bottom, pushing warmer water up.