Which of the following electron transitions is forbidden?

A) 4p ? 1s B) 3s ? 2p C) 3d ? 2p D) 3d ? 1s


D

Physics & Space Science

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In A.D. 1054, Chinese astronomers observed the appearance of a new star, whose location is now occupied by

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Kepler's first law states that the orbits of the planets around the Sun are

a. circles. b. ellipses. c. all lying in the same plane. d. none of these.

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The unit of electrical potential, the volt, is dimensionally equivalent to:

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What is a temperature inversion?

What will be an ideal response?

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