Textbook Question
Which two of the four quantum numbers determine the energy level of an orbital in a multielectron atom?
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Ch.5 - Periodicity & Electronic Structure of Atoms
Chapter 5, Problem 103
According to the Aufbau principle, which orbital is filled immediately before each of the following? (a) 3p (b) 4p (c) 4f (d) 5d
Verified step by step guidance1
Step 1: Understand the Aufbau principle, which states that electrons fill orbitals starting from the lowest energy level to the highest. This is often represented by the order of filling: 1s, 2s, 2p, 3s, 3p, 4s, 3d, 4p, 5s, 4d, 5p, 6s, 4f, 5d, 6p, 7s, 5f, 6d, 7p.
Step 2: For part (a), identify the orbital filled immediately before 3p. According to the order, 3s is filled before 3p.
Step 3: For part (b), identify the orbital filled immediately before 4p. According to the order, 3d is filled before 4p.
Step 4: For part (c), identify the orbital filled immediately before 4f. According to the order, 6s is filled before 4f.
Step 5: For part (d), identify the orbital filled immediately before 5d. According to the order, 4f is filled before 5d.
Related Practice
Open Question
Order the orbitals for a multielectron atom in each of the following lists according to increasing energy. (a) 4d, 3p, 2p, 5s (b) 2s, 4s, 3d, 4p (c) 6s, 5p, 3d, 4p
Textbook Question
According to the aufbau principle, which orbital is filled immediately after each of the following in a multielectron atom?
(a) 4s
(b) 3d
(c) 5f
(d) 5p
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Open Question
Give the expected ground-state electron configurations for the following elements: (a) Ti (b) Ru (c) Sn (d) Sr (e) Se.
Textbook Question
Give the expected ground-state electron configurations for atoms with the following atomic numbers. (a) Z = 55 (b) Z = 40 (c) Z = 80 (d) Z = 62
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Open Question
Draw orbital-filling diagrams for the following atoms. Show each electron as an up or down arrow, and use the abbreviation of the preceding noble gas to represent inner-shell electrons. (a) Rb (b) W (c) Ge (d) Zr