metals nonmetals
Metalloids
Metalloids
chemical Properties
Density
100
What are the properties of Metals?
Good thermal Conductors
Good Electrical Conductors
Luster
Corrosive
Reactive
Malleable
Ductile
100
What are the five evidence that prove a reaction has occurred?
precipitate formation
Temperature change
Gas formation
Color change
Light and heat
100
What is the equation for density?
Mass / Volume
200
If a substance is brittle, yellow and dull, what type of substance is this?
Nonmetal
200
Elephant toothpaste gave what evidence of chemical reaction?
Gas formation, temperature change
200
If a cap floats on top of the oil and the oil floats on top of water, which one is less dense?
The cap
300
A company is designing a new cell phone. They need a solid material that conducts electricity and can be made into a thin wire.
Which material would best fit their needs?
Nonmetal
Metalloid
Metal
Semi-conductor
Metal
300
A student had a beaker with a small amount of baking soda. The student added a few drops of pickle juice to the baking soda and observed fizzing and bubbling.
Based on observation, which of these can the student conclude?
A chemical reaction produced a solid.
No chemical reaction took place.
Only a physical change happened.
A chemical reaction produced a gas.
A chemical reaction produced a gas.
300
Where was the dish soap located on the density tower?
Under the water
400
The capability of a substance to be stretched into thin wires without breaking is known as —
malleability
conductivity
luster
ductility
ductility
400
During a science class investigation, a teacher places a small amount of sugar in a beaker and heats it over a candle. Which of the following would be the best evidence that a change in the chemical properties of the sugar has taken place?
The sugar gets hotter.
The sugar gets larger.
The sugar turns into a liquid.
The sugar turns black.
The sugar turns black.
400
Describe the different density between honey and syrup in terms of structure of atoms
There are more atoms and closer together in honey than in syrup.
500
Phosphorus, Lithium, and Fluorine are elements that are found on the Periodic Table. Students conduct several tests involving samples of these three elements at normal room temperature.
Based on the physical properties of metals, nonmetals, and metalloids, which observation is correct?
Fluorine is malleable, and lithium conducts electricity.
Lithium is malleable and conducts electricity.
Phosphorus is malleable and conducts electricity.
All three elements are malleable and conduct electricity.
Lithium is malleable and conducts electricity.
500
Students were investigating two clear solutions. Students added 2 mL of one solution to a beaker of the other solution. The result is pictured below.
A student observed that the temperature of the beaker did not have any noticeable changes, however the mass of the substances in the beaker increased. A red precipitate formed where the substance was poured into the beaker. The precipitate separated from the solution and fell to the bottom of the beaker.
Which observation provides the best evidence that a chemical change formed a new substance in the beaker?
A precipitate is formed.
The precipitate fell to the bottom.
The temperature did not change.
There is an increase in mass.
A precipitate is formed.
500
A student is preparing a science demonstration with three liquids: saltwater, apple juice, and honey. When poured into a graduated cylinder, the liquids separate into layers with saltwater on top, apple juice in the middle, and honey on the bottom.
What statement BEST describes the apple juice?
Apple juice is the most dense of the three liquids.
Apple juice is less dense than saltwater and honey.
Apple juice has a density between saltwater and honey.
Apple juice is more dense than honey but less dense than saltwater.
Apple juice has a density between saltwater and honey.