1. The electron configuration for calcium, atomic number -20 is e. None of the a
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Question
1. The electron configuration for calcium, atomic number -20 is e. None of the above lowest-energy arrangement of electrons in a subshell is obtained by putting s into separate orbitals of the subshell with the same spin before pairing electrons is rule that the called (the) a. Aufbau Principle b. Pauli Exclusion Principle c. Heisenberg's Uncertainty Principle d. Hund's Rule e. Orbital Diagram 3. Which of the following statements is false? Rutherford's theory of the atom did not explain why the electron did not spiral into the a. b. Bohr's energy-level postulate stating that an atom has only specific energy levels explains c. Bohr's postulate that an electron in an atom can change energy only by going from one d. Bohr's theory predicts atomic energy levels for atoms other than hydrogen. nucleus. why electrons don't cascade into the nucleus. energy level to another accounts for a gaseous atom's line spectra having only specific wavelengths of light e. None of the above.Explanation / Answer
1. OPTION B. The electrons in an atom occupy different orbitals based on increasing energies. This is giving by Aufbau's principle which gives gives the order of orbitals by computing the energies of each orbital from their wavefunctions which combined with Hund's rule for maximum spin multiplicity gives the order of filling up electrons orbtial-by-orbital.
2. OPTION D. Hund's rule of maximum spin multiplicity arises from the quantum mechanical energy calculations of electrons residing in individual orbital by considering their spins through Slater determinants.
3. OPTION D. All the given statements are true.
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