Transcript 01-09 1st sem review part 1 for web

1st Semester Review
1. The correct (accepted) value for the length of
a metal rod is 22.6 cm. Which of these sets of
measurements would be considered precise
but not accurate?
a.
b.
c.
d.
22.5 cm, 22.7 cm, 22.6 cm
20.4 cm, 20.2 cm, 20.3 cm
12.6 cm, 22.6 cm, 32.6 cm
24.6 cm, 23.7 cm, 25.9 cm
1st Semester Review
2. When moving from a lower (ground state) to
a higher energy level (excited state), the
electron __________.
a.
b.
c.
d.
always doubles its energy
releases a certain amount of energy
absorbs a certain amount of energy
emits photons of light
1st Semester Review
3. The most common isotope of lithium is
__________.
a.
b.
c.
d.
lithium-3
lithium-4
lithium-6
lithium-7
1st Semester Review
4. Which of the following statements about
nuclear energy would NOT be true?
a. Nuclear power plants are able to store and
dispose of radioactive waste efficiently and
safely.
b. Nuclear power plants produce no air pollution or
carbon dioxide emissions.
c. Nuclear power reduces the consumption of fossil
fuels compared to coal power.
d. Nuclear reactions produce significantly greater
amounts of energy than chemical reactions.