CEM 141 Exam 1 MSU Pollock –
Questions and Answers
Which atomic model(s) would you be able to use as evidence to support the
claim "atoms are composed of mostly empty space?" - -Rutherford's
Planetary model
- "Does the planet Venus have phases like the moon?" Is this question a
scientific question? - -Yes because it can be tested through observations and
experiments.
- As two protons move toward each other, the potential energy of the
system will - - -increase because of the repulsive force between like charges.
- One part of Dalton's Atomic Theory states:
Compounds are formed by combinations of atoms from two or more
elements.
Is this statement currently considered to be true or false and why? - -True
because by definition a compound must have at least two types of elements.
- Thomson discovered that the type of metal used for the cathode did not
affect the behavior of the cathode ray. What claim does this piece of
evidence support? - -All atom contain electrons.
- Consider the container of Xe atoms where two Xe atoms of interest are
interacting (the system) and are surrounded by other Xe atoms in the
system. The surrounding Xe atoms have more energy than the system.
Which direction would you predict the energy would be transferred and what
would happen? - -During a collision energy will be transferred from the
surrounding Xe atoms to the system of two Xe atoms and the stable
interaction will be overcome.
- How would the strength of the electrostatic force change if the distance
between two charged objects increased? - -The electrostatic force would
become weaker.
- Which of the following statements are true for both LDFs and covalent
bonds? - -They are both attractive interactions and they both release energy
when they are formed.
- When oxygen boils - - -LDFs between the O2 molecules are overcome.
- You are asked to compare the interaction between atoms of two
substances, X and Y. When you look at the graph showing how potential
Questions and Answers
Which atomic model(s) would you be able to use as evidence to support the
claim "atoms are composed of mostly empty space?" - -Rutherford's
Planetary model
- "Does the planet Venus have phases like the moon?" Is this question a
scientific question? - -Yes because it can be tested through observations and
experiments.
- As two protons move toward each other, the potential energy of the
system will - - -increase because of the repulsive force between like charges.
- One part of Dalton's Atomic Theory states:
Compounds are formed by combinations of atoms from two or more
elements.
Is this statement currently considered to be true or false and why? - -True
because by definition a compound must have at least two types of elements.
- Thomson discovered that the type of metal used for the cathode did not
affect the behavior of the cathode ray. What claim does this piece of
evidence support? - -All atom contain electrons.
- Consider the container of Xe atoms where two Xe atoms of interest are
interacting (the system) and are surrounded by other Xe atoms in the
system. The surrounding Xe atoms have more energy than the system.
Which direction would you predict the energy would be transferred and what
would happen? - -During a collision energy will be transferred from the
surrounding Xe atoms to the system of two Xe atoms and the stable
interaction will be overcome.
- How would the strength of the electrostatic force change if the distance
between two charged objects increased? - -The electrostatic force would
become weaker.
- Which of the following statements are true for both LDFs and covalent
bonds? - -They are both attractive interactions and they both release energy
when they are formed.
- When oxygen boils - - -LDFs between the O2 molecules are overcome.
- You are asked to compare the interaction between atoms of two
substances, X and Y. When you look at the graph showing how potential
