Download Chem 1311 Chapter 8 Homework: Electron Configurations and Atomic Structure and more Assignments Chemistry in PDF only on Docsity!
Chem 1311 Chapter 8 Homework Spring 2021 Name: __________________________
- (2) What is the maximum number of electrons that can occupy all of the orbitals in the 3d subshell? 14 2 10 1 6
- (2) Which of the following orbital occupancy designations is incorrect? 3d^4 4d^1 2p^7 1s^1 1s^2
- (2) What is the maximum number of electrons in an atom that have the set of quantum numbers n = 4 and l = 3? 10 2 14 18 6
- (2) Which of the following orbital diagrams violates the Pauli exclusion principle?
[Ar]
4s^2 3d^2 3d^2 3d^1
(a) [Ne]
3s^2 3p^3 3p^0 3p^0 (b) 3d^1 3d^1
[Ar]
4s^2 3d^2 3d^2 3d^2 (d)
[Ne]
3s^2 3p^1 3p^1 3p^1 (c) 3d^1 3d^0
[Ar]
4s^2 3d^1 3d^1 3d^1 (e) 3d^1 3d^1 4p^1 4p^1 4p^1
- (2) Which of the following orbital diagrams violates Hund’s rule?
[Ar]
4s^2 3d^2 3d^2 3d^2
(a) [Ne]
3s^2 3p^1 3p^1 3p^1 (b) 3d^1 3d^1
[Ar]
4s^2 3d^2 3d^2 3d^2 (d)
[Ne]
3s^2 3p^2 3p^1 3p^1 (c) 3d^1 3d^1
[Ar]
4s^2 3d^1 3d^1 3d^1 (e) 3d^1 3d 1 4p^1 4p^1 4p^1
- (2) Which of the following orbital diagrams violates the Aufbau Principle (the Building Up Principle)?
[Ar]
4s^2 3d^1 3d^1 3d^1
(a) [Ne]
3s^0 3p^2 3p^2 3p^2 (b) 3d^1 3d^1
[Ar]
4s^2 3d^2 3d^2 3d^0 (d)
[Ne]
3s^2 3p^1 3p^1 3p^1 (c) 3d^0 3d^0
[Ar]
4s^2 3d^2 3d^2 3d^2 (e) 3d^2 3d^2 4p^0 4p^0 4p^0
- (3) Select the electron configurations which represents an excited state of the indicated atom? Na: 1s 2 2s 2 2p 6 3p 1 O: 1s 2 2s 2 2p 4 Sc: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 1 Al: 1s 2 2s 2 2p 6 3s 2 3p 1 He: 1s 1 2s 1 Cr: 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d 5
- (2) Two elements that have the same ground-state valence shell configuration of n s 2 n p 4 are K and Mg. O and Se. Al and Ga. Ge and Pb. Mg and Ca.
- (2) According to the building-up principle or Aufbau principle, which subshell is typically filled next after the 6p subshell? 6d 4p 7s 3d 5s 6f 6q
- (2) Which of the following electron configurations corresponds to the ground state of an atom of an alkaline earth metal element? 1s^2 2s^2 2p^5 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^2 1s^2 2s^2 2p^6 3s^2 3p^6 4s^2 3d^10 4p^6 5s^1 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 7 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 1s 2 2s 2 2p 6 3s 2 3p 1
- (2) The ground-state valence-shell configuration of a particular atom is 4s 2 3d 10 4p 5 . The element to which this atom belongs is a noble gas. Halogen alkali metal transition metal metalloid chalcogen alkaline earth metal actinide lanthanide
- (2) All of the following ground-state electron configurations are correct except Fe:[Ar]4s 2 4d 6 . Ca:[Ar]4s 2 . In:[Kr]4d 10 5s 2 5p 1 . Cu:[Ar]3d 10 4s 1 . Xe:[Kr]4d 10 5s 2 5p 6 .
- (2) What is the total number of electrons in s orbitals in a ground-state molybdenum (Mo) atom? 6 10 12 18 24 30 42
- (2) How many valence electrons does a sulfur atom have? 1 2 3 4 5 6 7 8 10 16
- (2) How many valence electrons does the following atom have? 1 2 3 4 5 6 7 8 10 16 20 1s 2 2s^2 2p^2 2p^2 2p^2 3s^2 3p^2 3p^2 3p^2 4s^2
- (2) How many valence electrons does the following atom have? 1 2 3 4 5 6 7 8 10 16 1s^2 2s^2 2p^2 2p^2 2p^2 3s^2 3p^2 3p^2 3p^1
- (2) Which of the following sets of four quantum numbers ( n , l , ml , ms ) correctly describes one of the valence electrons in a ground-state bismuth (Bi) atom? 7 1 0 6 1 0 7 2 0 7 0 0 7 0 0 +
- (2) What is the ground-state electron configuration of rhenium (Re)?
- (2.5) An atom of which of the following elements has the smallest atomic radius? As Rb Si Se S
- (2.5) The change in energy for which of the following processes represents the electron affinity of iodine? I(g)→ I 2+ (g) + 2e - I(g) + e -^ → I - (g) 2I - (g)→ I 2 (s) + 2e - I(g)→ I
- (g) + e - I - (g)→ I + (g) + 2e -
- (2.5) The change in energy for which of the following processes corresponds to the second ionization energy of magnesium? Mg(g)→ Mg 2+ (g) + 2e - Mg(g)→ Mg + (g) + e - Mg + (g)→ Mg2+(g) + e - Mg
- (g)→ Mg(g) + e - Mg(g) + e - → Mg-(g)
- (2.5) An atom of which of the following elements has the smallest ionization energy? K H F B N
- (2.5) An atom of which of the following elements has the largest first ionization energy? I Br Te Ge Sr
- (2.5) The change in energy for which of the following processes corresponds to the first ionization energy of bromine? Br 2 (g)→ 2Br(g) Br(g) + e
- → Br - (g) Br + (g) + Br - (g) → Br 2 (l) Br(g) → Br
- (g) + e - Br - (g) → Br(g) + e -
- (2.5) An atom of which of the following elements has the most negative electron affinity? Rb As Cl Br Se
- (2.5) Which of the following ground-state electron configurations corresponds to an atom that has the smallest first ionization energy? 1s 2 2s 2 2p 6 3s 1 1s 2 2s 2 2p 6 3s 2 3p 5 1s 2 2s 2 2p 6 3s 2 3p 2 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d 10 1s 2 2s 2 2p 6
- (3.5) Select those that do NOT have ground-state noble-gas electron configurations. C 4 – Na + Ar Cl - N 3– Al + Ga 3+
- (2.5) What is the ground-state electron configuration of the Co 2+ ion? 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 5 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d 6 2s 2 2p 6 3s 2 3p 6 4s 2 3d 7 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 9 1s 2 2s 2 2p 6 3s 2 3p 6 3d 7
- (2.5) What is the electron configuration for? Mn 3+ 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 2 1s 2 2s 2 2p 6 3s 2 3p 6 4s 1 3d 3 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 8 1s 2 2s 2 2p 6 3s 2 3p 6 3d 4 2s 1 2p 6 3s 2 3p 6 4s 2 3d 5 1s 2 2s 2 2p 6 3s 2 3p 6 4s 2 3d 5
- (2.5) The Co 2+ ion would be expected to have ____ unpaired electrons. 4 2 3 0 1 5
- (2.5) Which two species are isoelectronic? Na
- and Ca + Cl - and F - Ca 2+ and Mg 2+
- (2.5) Rank the following ions in order of decreasing atomic radii: Os 4+ , Os 2+ , Os 5+ . Os2+^ > Os4+^ > Os5+^ Os5+^ > Os4+^ > Os2+^ Os4+^ > Os2+^ > Os5+ Os 5+ > Os 2+ > Os 4+ Os 2+ > Os 5+ > Os 4+
- (3) For each select which has the largest radius: (type A or B in each blank) Blank 1 (A or B) Fe 2+^ Fe 3+ A B^ Blank 2 (A or B) O 2–^ S 2– A B^ Blank 3 (A or B) K + A B K Blank 1 (A or B) N 3– A B^ Blank 2 (A or B) A B^ Blank 3 (A or B) Ca 2+ A B N (^) S 2–^ F – Ca
- (3) Can an orbital with the following quantum numbers exist? In each blank, type yes or no Blank 1: n = 4, l = 3, ml = -2, ms = +1 Blank 2: n = 4, l = 1, ml = –1, ms = – 1/ Blank 3: n = 6, l = 0, ml = 0, ms = +1/2 Blank 4: n = 7, l = 2, ml = –3, ms = +1/ Blank 5: n = 1, l = –1, ml = –1, ms = +1/2Blank 6: n = 5, l = 4, ml = +4, ms = –
