Electrons And Energy: Question Preview (ID: 5751)


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To calculate the frequency of an electromagnetic wave, you need to know the speed of the wave and its:
a) wavelength b) intensity c) amplitude d) energy
What is the frequency of a light wave with a wavelength of 680 nm (6.8 e - 7 m)
a) 2.04 e 9 Hz b) 2.04 s c) 2.27 e - 15 Hz d) 4.41 e 14 Hz
An electromagnetic wave in a vacuum has a wavelength of 0.07m. What is its frequency?
a) 3.0 e 8 m/s b) 4.3 e 9 Hz c) 3.0 e 9 Hz d) 4.3 e 8 m/s
Use Plank's constant to solve the following. What is the amount of energy carried by a photon that has a frequency of 5.71 e 14 Hz.
a) 525 nm b) 3.78 e -19 J c) 1.16 e -8 J d) 8.62 e 47 J
Infrared rays have a shorter wavelength than
a) ultraviolet rays b) gamma rays c) x rays d) radar waves
A photon is emitted from an atom with an energy of 4.25 e -19 J. What is the wavelength of the photon?
a) 4.69 e -7 m b) 1.28 e -10 m c) 2.73 e -4 m d) 6.42 e 14 m
For an electron in an atom to change from the ground state to an excited state,
a) energy must be released b) energy must be gained c) radiation must be emitted d) the electron must move from a higher to a lower energy level
A student records the following electron configuration for the element Arsenic: 1s2 2s2 2p6 3s2 3p6 4s2 4d10 4p3. Is this correct? Why or why not?
a) It is a correct electron configuration. b) It is not correct because there are too many electrons c) It is not correct because there are not enough electrons d) It is not correct because the 4d should be 3d
The statement that no two electrons in the same atom can have the same four quantum numbers is a restatement of:
a) Bohr's Law b) Hund's Rule c) Aufbau Principle d) Pauli Exclusion Principle
Oxygen has an electron configuration of 1s2 2s2 2p4, how many unpaired electrons does oxygen have?
a) 1 b) 2 c) 3 d) 4
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