General Chemistry: Atoms First
General Chemistry: Atoms First
2nd Edition
ISBN: 9780321809261
Author: John E. McMurry, Robert C. Fay
Publisher: Prentice Hall
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Chapter 20, Problem 20.22CP

(a)

Interpretation Introduction

Interpretation:

On the periodic table, the position of the given element has to be located.

(a)

Expert Solution
Check Mark

Explanation of Solution

Given electronic configuration,

[Ar]3d74s2

Electron filling concepts in orbitals:

  • Electrons first occupy the orbitals with lower energy than the orbitals with higher energy (Aufbau principle).
  • An orbital can be occupied only by two electrons having opposite spins (Pauli exclusion principle).
  • Each electron fills each orbital till it is half filled, when they are degenerate orbital (Hund’s rule).

The order of electrons filling in a multi-electron atom is given as follows,

General Chemistry: Atoms First, Chapter 20, Problem 20.22CP , additional homework tip  1

Figure 1

The order of orbitals in their increasing energy is given by

1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s<5f<6d<7p

Calculate the total number of electrons in the given electronic configuration and identify the element

[Ar]3d74s218(fromAr)+9=27electronsgivenatomisneutral,soZ=27forCo

The position of the given element on the periodic table is given below:

General Chemistry: Atoms First, Chapter 20, Problem 20.22CP , additional homework tip  2

Figure 2

(b)

Interpretation Introduction

Interpretation:

On the periodic table, the position of the given element has to be located.

(b)

Expert Solution
Check Mark

Explanation of Solution

Given electronic configuration,

[Ar]3d54s1

Electron filling concepts in orbitals:

  • Electrons first occupy the orbitals with lower energy than the orbitals with higher energy (Aufbau principle).
  • An orbital can be occupied only by two electrons having opposite spins (Pauli exclusion principle).
  • Each electron fills each orbital till it is half filled, when they are degenerate orbital (Hund’s rule).

The order of electrons filling in a multi-electron atom is given as follows,

General Chemistry: Atoms First, Chapter 20, Problem 20.22CP , additional homework tip  3

Figure 1

The order of orbitals in their increasing energy is given by

1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s<5f<6d<7p

Calculate the total number of electrons in the given electronic configuration and identify the element

[Ar]3d54s118(fromAr)+6=24electronsGivenelementisneutral,soZ=24forCr

The position of the given element on the periodic table is given below:

General Chemistry: Atoms First, Chapter 20, Problem 20.22CP , additional homework tip  4

Figure 3

(c)

Interpretation Introduction

Interpretation:

On the periodic table, the position of the given element has to be located.

(c)

Expert Solution
Check Mark

Explanation of Solution

Given electronic configuration,

[Kr]4d25s2

Electron filling concepts in orbitals:

  • Electrons first occupy the orbitals with lower energy than the orbitals with higher energy (Aufbau principle).
  • An orbital can be occupied only by two electrons having opposite spins (Pauli exclusion principle).
  • Each electron fills each orbital till it is half filled, when they are degenerate orbital (Hund’s rule).

The order of electrons filling in a multielectron atom is given as follows,

General Chemistry: Atoms First, Chapter 20, Problem 20.22CP , additional homework tip  5

Figure 1

The order of orbitals in their increasing energy is given by

1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s<5f<6d<7p

Calculate the total number of electrons in the given electronic configuration and identify the element

[Kr]4d25s236(fromKr)+4=40electronsgivenelementisneutral,soZ=40forZr

The position of the given element on the periodic table is given below:

General Chemistry: Atoms First, Chapter 20, Problem 20.22CP , additional homework tip  6

Figure 4

(d)

Interpretation Introduction

Interpretation:

On the periodic table, the position of the given element has to be located.

(d)

Expert Solution
Check Mark

Explanation of Solution

Given electronic configuration,

[Xe]4f36s2

Electron filling concepts in orbitals:

  • Electrons first occupy the orbitals with lower energy than the orbitals with higher energy (Aufbau principle).
  • An orbital can be occupied only by two electrons having opposite spins (Pauli exclusion principle).
  • Each electron fills each orbital till it is half filled, when they are degenerate orbital (Hund’s rule).

The order of electrons filling in a multielectron atom is given as follows,

General Chemistry: Atoms First, Chapter 20, Problem 20.22CP , additional homework tip  7

Figure 1

The order of orbitals in their increasing energy is given by

1s<2s<2p<3s<3p<4s<3d<4p<5s<4d<5p<6s<4f<5d<6p<7s<5f<6d<7p

Calculate the total number of electrons in the given electronic configuration and identify the element

[Xe]4f36s254(fromXe)+5=59electronsgivenelementisneutral,soZ=59forPr

The position of the given element on the periodic table is given below:

General Chemistry: Atoms First, Chapter 20, Problem 20.22CP , additional homework tip  8

Figure 5

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Chapter 20 Solutions

General Chemistry: Atoms First

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