21st Century Astronomy
21st Century Astronomy
6th Edition
ISBN: 9780393428063
Author: Kay
Publisher: NORTON
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Chapter 5, Problem 2QP
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Reason why iron and sodium are different.

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How does the wave model of electrons orbiting the nucleus account for the fact that the electrons can only have discrete energy values? A. Electrons are only able to vibrate at particular frequencies.  B. When an electron wave is confined, it is reinforced at only particular frequencies.  C. The energy values of an electron only occur where its wave properties and probability clouds are mutually reinforcing.  D. The wave model accounts for the types of orbitals an electron may occupy, not energy levels.  E. None of the above
10. What prevents gravity from pulling you through the ground to the center of Earth? Choose the best answer. A. The positive nuclei of your body's atoms repel the positive nuclei of the atoms of the ground. B. The density of the ground is greater than the density of your body. C. Atoms are bound together by chemical bonds. D. Electrons on the ground's surface and the surface of your feet repel one another.
How does the energy of an electron relate with the distance from the nucleus? O a. The farther a proton is from the nucleus, the greater the electron's energy. O b. The closer a proton is from the nucleus, the greater the electron's energy. O c. The closer a neutron is from the nucleus, the greater the electron's energy. Od. The farther an electron is from the nucleus, the greater its energy. e. The closer an electron is from the nucleus, the greater its energy.
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