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Which of these elements has two valence electrons? Select one of the options below as your answer: A. hydrogen (H) B. barium (Ba) C. nitrogen (N) D. krypton (Kr) E. bromine
(Br)
B. barium (Ba) has two valence electrons.
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Asked 4/4/2013 1:02:24 PM
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Which of the following states that an orbital can contain two electrons only if all other orbitals at that sublevel contain at least one electron? Select one of the options below as your answer: A. Archimedes' principle B. Aufbau principle C. Hund’s rule D. Pauli exclusion principle E. Le Chatelier's principle
Weegy: an orbital can contain two electrons only if all other orbitals at that sublevel contain at least one lectron is D. Pauli exlcusion principle [ ] (More)
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Asked 4/4/2013 1:42:09 PM
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What is the change in energy of an atom if the wavelength of the photon absorbed by the atom is equal to 4.64 x 10-7 meters? (Planck’s constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s)? Select one of the options below as your answer: A. 1.428 x 10-41 joules second B. 3.074 x 10-26 joules C. 3.440 x 10-19 joules/second D. 4.281 x 10-19 joules E. 10.255 x 10-49 joule second
Weegy: The answer of "What is the change in energy of an atom if the wavelength of the photon absorbed by the atom is equal to 4.64 x 10-7 meters? (Planck’s constant is 6.626 x 10-34 joule seconds; the speed of light is 2.998 x 108 m/s) is: C. [ 3.440 x 10-19 joules/second. Thanks! ] (More)
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Asked 4/4/2013 2:04:34 PM
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