In a gas of different types of molecules all at the same temperature, the speeds of the heavier molecules will generally be _____________ the speeds of the lighter molecules
a. the same as c. less than
b. greater than d. unrelated to
C
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When the electrons in an atom are in their lowest possible energy levels, the atom is said to be in its ____________________ state
Fill in the blank(s) with correct word
Energy Levels: The wavelength of a ruby laser is 694.3 nm. What is the energy difference between the two energy states for the transition that produces this light? (c = 3.00 × 108 m/s, 1 eV = 1.60 × 10-19 J, h = 6.626 × 10-34 J ? s)
A. 1.54 eV B. 1.65 eV C. 1.79 eV D. 1.81 eV
The energy of a photon is related to
A) the energy given to the atom that emits it. B) the energy transition in de-excitation. C) its frequency. D) all of the above E) none of the above
When electrons are placed in a magnetic field, their spin orientations are quantized. How many orientations with respect to the field may result?
a. 1 c. 3 b. 2 d. 4 or more