Elements and Compounds
The table where all known elements are organized and represented.
The Periodic Table
Which of the following characteristics is shared by all chemical reactions?
a. show a color change
b. form a new substance
c. release heat energy
b. form a new substance
All of these properties describe metals except-
a. brittle
b. malleable
c. ductile
a. brittle
What is the density of a rock with a mass of 54g and a volume of 6mL.
9 g/mL
Which of the following is a renewable resource?
a. coal
b. solar
c. oil
b. solar
A pure substance that cannot be broken down into simpler substances.
a. element
b. compound
a. element
Bubbles can be seen when mixing vinegar with baking soda, this is evidence that a ________ change has occurred.
chemical
Conductivity is a property of matter that describes its ability to-
a. reflect light
b. transfer thermal and electrical energy
c. be hammered into thin sheets
b. transfer thermal and electrical energy
What is the formula for calculating density?
density= mass/ volume.
What is a major disadvantage of using nuclear power?
a. radiation
b. greenhouse gases
c. pollution
a. radiation
The atmosphere is made up of mostly-
a. oxygen
b. hydrogen
c. nitrogen
c. nitrogen
Which of the following could indicate that a new substance has been formed?
a. the volume increases
b. the mass increases
c. the temperature decreases
c. the temperature decreases
Unlike non-metals, most metals tend to-
a. conduct heat and electricity well
b. have less luster
c. be gases at room temperature
a. conduct heat and electricity well
A rocks density is 5 g/cm3. Determine the mass if the rock has a volume of 20 cm3.
100 grams
Why is it better for humans to use renewable resources?
Because they can be replaced faster and more easily than nonrenewable resources.
The atmosphere of the Earth is comprised mostly of oxygen and-
a. carbon
b. hydrogen
c. nitrogen
c. nitrogen
Melting an ice cube is an example of a ________ change.
physical
Nonmetals are located on the __________ side of the periodic table.
right
A measure of how much substance is packed into a space is-
a. density
b. mass/volume
c. volume
a. density
Coal, oil and natural gas are created-
a. by nuclear waste
b. from the remains of plants and animals
b. from the remains of plants and animals
If a geologist finds a rock while collecting in the field, chances are high that the rock contains.
a. iron
b. potassium
c. silicon
c. silicon
Burning wood is an example of a ________ change.
chemical
List the three main types of elements that can be found on the periodic table..
metals, nonmetals and metalloids.
What is the density of water?
1 g/cm3
_______ energy is another term for heat that is produced inside the earth.
a. biomass
b. solar
c. geothermal
c. geothermal