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Which has the more stable 2s orbital: a Be atom or a Be2+ cation?
a. Be
b. both are the same
c. Be2+
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- Do atoms in excited states emit radiation randomly, at any wavelength? Why? What does it mean to say that the hydrogen atom has only certain discrete energy levels available? How do we know this? Why was the quantization of energy levels surprising to scientists when it was first discovered?Which orbitals contains the one pair on the nitrogen atom of pyridine? 1.SP 2.S 3.SP2 4.P1.I just need some help understanding how to tell the different between the size, shape , and energy of different orbitals. 1) explain how a 2s orbital differs in size shape and energy from a 5s orbital chemistry? 2) Explain how a 4dxy orbital differs in size, shape, and/or energy from a 4dyz orbital?
- While you are on an expedition to a local quarry with your archaeology class, you are allowed to take home a small piece of limestone to remember your adventure. Through a series of experiments, you discover that the chemical composition of limestone is predominately Ca, C, and O. A. Write the condensed electron configuration of each of the elements in limestone. B. Draw the orbital energy diagram for neutral calcium. C. The actual compound predominantly found in limestone is CaCO3. Write the electron configuration for the calcium cation.What is the ground state electron configuration for phosphide ion (p3-)? A. Ne 3s2 B. Ne 3s2 3p3 C. Ne 3p3 D. Ne 3s2 3p6Which is the valence shell of AI*3 ion? A. N B. L С. М D. K
- The following are hypothetical configurations for a carbon atom.1. 1s22s22p22. 1s22s12p12d23. 1s22s12p34. 1s32s35. 1s22p46. 1s22s22p3 The questions are 1. Which uses nonexistent orbitals? 2. Which are forbidden by the Pauli principle? 3. Which are excited states and which is the ground-state configuration?1. Which of the following is the configuration of carbon? а. 1522522p2 d. 1s22s12p4 b. 1s22s22p4 е. none of the above с. 1s22s12p3 2. Which statement is the best description of chlorine, Cl2? a. polar molecule d. ionic compound b. polar bonds, non polar molecule e. none of the above с. non polar molecule 3. The ion PCI4" has a structure that would be described as? a. octahedral d. T-shaped b. Square planar e. see-savw c. trigonal pyramidal 4. Which of the following substances would not be polar? a. Hydrogen chloride b. sulfur dioxide c. Ammonia d. Carbon disulfide 5. What does a double bond consist of? a. none of the other choices is correct. b. Two sigma bonds c. Two pi bonds d. One sigma and a pi bond e. Two sp3 bondsAccording to Hund’s rule, how many singly-occupied orbitals are there in the valence shell of a carbon atom in its lowest energystate?a. noneb. onec. twod. threee. four
- Consider the theoretical electron configuration below. X. 1s²2s²2p4 Y. 1s² 2s²2p6 3s² 3d8 Which one(s) is (are) paramagnetic? X only Y only X and Z only X and Y only Y and Z only Z. 1s² 2s22p6 3s² 3d10Consider each of the following series of atoms/ions: For which series does the valence electron configuration fit the model ns?np? (n = 1, 2, 3, etc.)? O A. B, C, N* O B. None of these OC.N, P, As O D. O, S, Se O E. B, AI, Sc 8Atomic Orbitals that overlap “out of phase” can form: (which of these options)