Quantization of electron energy states in an atom is better understood in terms of the electron's
A) wave nature.
B) particle nature.
C) neither of these
Answer: A
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How might the most common occurring stars be described, based on our stellar neighborhood?
A) white dwarfs B) K giants C) G main sequence D) A main sequence E) M main sequence
The sketch above shows groups of stars on the H-R diagram, labeled (a) through (e); note that (a) represents the entire main sequence while (c) and (d) represent only small parts of the main sequence
Which group represents stars that are extremely bright and emit most of their radiation as ultraviolet light? A) a B) b C) c D) d E) e
The difference between the "ground state" and an "excited state" for a hydrogen atom is
A) the atom can radiate when it is in an excited state, but not when it is in a ground state. B) the excited state has more energy. C) Both of the above. D) a ground state's matter field is a standing wave but an excited state's matter field is not a standing wave. E) All of the above.
What is the largest ocean on Earth?
a. Atlantic b. Indian c. Antarctic d. Mediterranean e. Pacific