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WorksheetsUnit 2, Part 2 Post Test Review
Total questions: 22
Worksheet time: 11mins
What is happening to the forces in an atom when an interaction is considered attractive?
The nucleus of one atom is attracted to the electron of the other atom. This force is stronger than the repulsion between the two nuclei and two electrons.
The nucleus of one atom is attracted to the electron of the other atom. The force is weaker than the repulsion between the two nuclei and two electrons.
The nucleus of one atom is attracted to the electron of the other atom. This force is equal to the repulsion between the two nuclei and two electrons.
What is happening to the forces in an atom when an interaction is considered repulsive?
The nucleus of one atom is attracted to the electron of the other atom. This force is stronger than the repulsion between the two nuclei and two electrons.
The nucleus of one atom is attracted to the electron of the other atom. The force is weaker than the repulsion between the two nuclei and two electrons.
The nucleus of one atom is attracted to the electron of the other atom. This force is equal to the repulsion between the two nuclei and two electrons.
What is happening to the forces in an atom when an interaction is considered balanced?
The nucleus of one atom is attracted to the electron of the other atom. This force is stronger than the repulsion between the two nuclei and two electrons.
The nucleus of one atom is attracted to the electron of the other atom. The force is weaker than the repulsion between the two nuclei and two electrons.
The nucleus of one atom is attracted to the electron of the other atom. This force is equal to the repulsion between the two nuclei and two electrons.
The difference in potential energy between when two atoms are bonded and when they are separate is called ___________.
chemical bond
kinetic energy
endothermic
binding energy
What is happening with the attractive and repulsive forces at Point I?
They are balanced.
They are attractive.
They are repulsive.
What is happening with the attractive and repulsive forces at Point 2?
They are balanced.
They are attractive.
They are repulsive.
What is happening with the attractive and repulsive forces at Point 3?
They are balanced.
They are attractive.
They are repulsive.
The binding energy is found between which two points on the graph?
Point I and Point II
Point II and Point III
Point I and Point III
What is the role of the third atom when two atoms try to form a molecule?
It adds kinetic energy to the system.
It removes kinetic energy from the system.
What is the role of the third atom when a molecule is broken?
It adds kinetic energy to the system.
It removes kinetic energy from the system.
What happens to atoms during a chemical reaction?
Atoms are removed from the system.
Atoms break and form new bonds.
Atoms explode.
Increasing the temperature in a system _________ a chemical reaction.
slows down
speeds up
doesn't affect
Increasing the temperature in a system _________ the kinetic energy of the system.
increases
decreases
doesn't affect
True or False. When chemical bonds break, energy is added to the surroundings.
True
False
True or False. When chemical bonds break, energy is added to the system.
True
False
True or False. When chemical bonds form, energy is added to the system.
True
False
True or False. When chemical bonds form, energy is added to the surroundings.
True
False
Which of the following bonds has the greatest change in potential energy?
H-H
O-H
O-O
Which of the following bonds has the smallest change in potential energy?
H-H
O-H
O-O
At which point would a chemical bond form?
Point I
Point III
Point II
In an ___________ reaction, more energy is transferred to the surroundings than is needed to start the reaction.
endothermic
exothermic
In an ___________ reaction, less energy is transferred to the surroundings than is needed to start the reaction.
endothermic
exothermic
