Atoms & Molecules
Density
Properties
States & their Changes
Miscellaneous
100
What is a compound?
a substance made from more than one element joined by a chemical bond
100
What is Density?
Mass/Volume
Mass of a substance per unit of volume.
100
What is the definition for property?
particular characteristics of a material such as the materials density, melting point, or color. A change in volume, size or shape of the material does not change its properties.
100
What are the three states?
Which one has the highest kinetic energy?
Which has the lowest kinetic energy?
Solid, liquid, gas
Highest = gas
Lowest = solid
100
What is the definition of a particle?
Small structures that make up all matter.
200
In the molecule C16H18O5 how many elements are there?
3 elements: Carbon, Hydrogen, Oxygen
200
What is the density of water?
1.0 g/cm3
200
List two types of physical properties.
Color
Malleability
Odor
State
Density
200
If you increase thermal energy what does this do to the motion of the particles?
Particles heat up and begin moving faster and break some of the bonds.
200
What is the definition of malleability?
The flexibility of a material.
300
Which one is a molecule?
Na
N
CO
Ca
CO
Carbon and Oxygen
300
If something has a density of 1.2 will it sink or float in water?
Sink
300
What is a chemical property?
how a material reacts with another substance
(reactivity)
300
What is happening to the gas particles in a container at room temperature?
The particles are spread far apart and barely touch each other.
300
What is the difference between a monomer and a polymer?
Monomer is a singular molecular subunit and a polymer is a long chain of smaller units called monomers.
400
What is the definition of an extended structure?
a varied number of one or more kinds of atoms bonded together to form a larger network.
400
What is the volume of a cube with a side length of
5 cm?
125 cm3
400
Which of the following is NOT a property that can be used to identify a material?
Flexibility
Shape
Color
Density
Shape
400
How is the shape of a substance determined by its state?
Solid particles are stuck together so they hold their shape. Liquid and gas particles move around so they do not hold their shape/can easily change.
400
What is the definition of temperature?
The measurement of the average kinetic energy of the particles.
500
In the compound 3CO2, how many of each type of atom?
3C (carbon) and 6 O (oxygen) for a total of 9 atoms
500
Johnny measures a piece of plastic and determines it has a mass of 20 grams and a volume of 5 cm3 . What is the density of the piece of metal? Will it sink or float?
4 g/cm3
Sink
500
Which of these substances would be a solid at room temperature?
In general, large molecular or extended structures tend to be solids at room temperature.
500
What happens to the particles when thermal energy is added to a substance?
Explain: Solid>Liquid>Gas
The particles will move more and spread out as the temperature increases because the pressure breaks the bonds.
500
What are some of the trade-offs associated with purchasing products made from plastic?
Name 3
recyclable
bad for environment
inexpensive
toxic