WorksheetsChemistry Semester 2 Final Review Day 3
Total questions: 20
Worksheet time: 11mins
Which statement is correct for a collision between reactant particles leading to a reaction?
All reactant particles must have the same energy
Colliding particles must have the same velocity
Colliding particles must have kinetic energy higher than the activation energy
Colliding particles must have different energy
Two clear liquids are mixed in a test tube which results in a yellow solid forming in the clear liquid. What is the evidence that a chemical reaction took place?
The fact that the liquid remains clear
The fact you mixed two different liquids
The fact that a precipitate formed
The fact that the temperature didn’t change
What does the limiting reactant do to a reaction?
It decreases the speed of the reaction.
It increases the speed of the reaction.
It starts the reaction once it is added.
It stops the reaction once it runs out.
What is the type of reaction for the chemical equationC2H5OH + O2 → CO2 + H2O
Synthesis
Single Replacement
Combustion
Decomposition
Covalent bonds are formed between two or more nonmetals, while ionic bonds are formed between a nonmetal and a metal. Which TWO pairs of elements will form covalent bonds between the atoms?
sulfur and fluorine
carbon and oxygen
sodium and bromine
potassium and chlorine
lithium and phosphorus
Which statement explains why the elements produce different colors in the flame test?
The elements are exposed to different heat levels during the flame test, causing a release of different amounts of energy.
The elements are exposed to different types of gases during the flame test, causing a release of different amounts of energy.
The movement of electrons between energy orbitals for each element is unique, producing unique wavelengths of light.
The number of protons remaining after the flame has interacted with the atom is unique, producing unique wavelengths of light.
Which model correctly shows the bonded and unbonded electrons in the covalent bond for ammonia, NH3?
Which picture correctly models magnesium bromide?
The student creates the atomic nucleus shown.
How many electrons should he add to the model to show a neutrally-charged atom?
7
10
14
18
Which element is shown in the student's model?
neon
nickel
fluorine
potassium
How could the student create a model that shows an isotope of this element?
The student could create a new model with one more proton.
The student could create a new model with one more neutron.
The student could create a new model with three fewer protons.
The student could create a new model with three fewer electrons.
The student wants to create a neutrally-charged carbon atom with an atomic mass of 13 amu. How many subatomic particles should he include in his model?
6 protons, 6 neutrons, and 6 electrons
7 protons, 6 neutrons, and 7 electrons
6 protons, 7 neutrons, and 6 electrons
7 protons, 7 neutrons, and 7 electrons
The model shows the trends of ionization energy and atomic radius in the Periodic Table.
Which statement is supported by the model?
Ionization energy increases, and atomic radius decreases across a period.
Ionization energy increases, and atomic radius increases down a group.
Ionization energy decreases, and atomic radius increases across a period.
Ionization energy decreases, and atomic radius decreases down a group.
An atom is in its most stable configuration when it has 8 electrons in its outer shell. When forming an ionic bond, one atom gives up electrons to empty its outer shell while the atom it bonds with gains the electrons the first atom gives up. Atoms that are members of group 2A have two electrons in their outer shell, so they can easily give up these two electrons.
An atom from group 2A forms an ionic bond with an atom from another group. Which group is the second atom MOST LIKELY from?
group 1A
group 6A
group 7A
group 8A
Radioactive isotopes that enter the body emit high energy particles called gamma radiation. Nuclear imaging technology detects these particles and produces images of them.
What would doctors be MOST concerned about when using nuclear imaging?
the detection of possible concerns inside of bone tissues
the ability to detect the presence and location of tumors
the level of accuracy of the images taken during the procedure
the release of gamma radiation from the body after imaging
Which statement explains why the elements produce different colors in the flame test?
The elements are exposed to different heat levels during the flame test, causing a release of different amounts of energy
The elements are exposed to different types of gases during the flame test, causing a release of different amounts of energy.
The movement of electrons between energy orbitals for each element is unique, producing unique wavelengths of light.
The number of protons remaining after the flame has interacted with the atom is unique, producing unique wavelengths of light.
Flammable materials, like alcohol, should never be used or dispensed near
an open door
an open flame
another student
a sink
Hot glass looks the same as cold glass
True
False
All chemicals in the laboratory are to be considered dangerous.
true
false
After completing an experiment, all chemical waste should be
left at your lab station for the next class
disposed of according to the instructor's directions
dumped into the sink
taken home
