Chapter 5, Problem 87A

(a)

Interpretation Introduction

Interpretation:

Theelement represented by electron configuration. $1s^{2}2s^{2}2p^5$ needs to be predicted.

Concept introduction:

The electron configuration of an element describes the distribution of electrons in orbitals.

Answer to Problem 87A

$1s^{2}2s^{2}2p^5$ represents Fluorine

Explanation of Solution

Given: $1s^{2}2s^{2}2p^5$

Explanations: The electron configuration of an element represents the distribution of electrons and provides relevant information regarding the valance electron. The Electron Configurations are useful for determining the valency of an element and interpreting the spectrum of the element $1s^{2}2s^{2}2p^5$ represents Fluorine because total number of electrons are 9 which represents atomic number of fluorine.

(b)

Interpretation Introduction

Interpretation:

The element which is represented by electron configuration $\left[Ar\right]4s^2$ needs to be determined.

Concept introduction:

The electron configuration of an element describes the distribution of electrons in orbitals.

Answer to Problem 87A

$\left[Ar\right]4s^2$ represents Calcium

Explanation of Solution

Given: $\left[Ar\right]4s^2$

Explanations: The electron configuration of an element represents the distribution of electrons and provides relevant information regarding the valance electron. The Electron Configurations are useful for determining the valency of an element and interpreting the spectrum of the element $\left[Ar\right]4s^2$ represents Calcium because total number of electrons is 20 which represents atomic number of calcium.

(c)

Interpretation Introduction

Interpretation:

The element which represents the electron configuration $\left[Xe\right]6s^{2}4f^4$ needs to be determined.

Concept introduction:

The electron configuration of an element describes the distribution of electrons in orbitals.

Answer to Problem 87A

$\left[Xe\right]6s^{2}4f^4$ represents Promethium

Explanation of Solution

Given: $\left[Xe\right]6s^{2}4f^4$

Explanations: The electron configuration of an element represents the distribution of electrons and provides relevant information regarding the valance electron. The Electron Configurations are useful for determining the valency of an element and interpreting the spectrum of the element

$\left[Xe\right]6s^{2}4f^4$ represents Promethiumbecause it corresponds to total number of electrons 61 which is atomic number of Promethium.

(d)

Interpretation Introduction

Interpretation:

Theelement which is represented by electron configuration. $\left[Kr\right]5s^{2}4d^{10}5p^4$ needs to be predicted.

Concept introduction:

The electron configuration of an element describes the distribution of electrons in orbitals.

Answer to Problem 87A

$\left[Kr\right]5s^{2}4d^{10}5p^4$ represents Tellerium

Explanation of Solution

Given: $\left[Kr\right]5s^{2}4d^{10}5p^4$

Explanations: The electron configuration of an element represents the distribution of electrons and provides relevant information regarding the valance electron. The Electron Configurations are useful for determining the valency of an element and interpreting the spectrum of the element

$\left[Kr\right]5s^{2}4d^{10}5p^4$ represents Tellerium which has number of electrons 52 and this is atomic number of tellurium.

(e)

Interpretation Introduction

Interpretation:

Theelement which is represented by electron configuration. $\left[Rn\right]7s^{2}5f^{13}$ needs to be determined.

Concept introduction:

The electron configuration of an element describes the distribution of electrons in orbitals.

Answer to Problem 87A

$\left[Rn\right]7s^{2}5f^{13}$ represents Mendelevium

Explanation of Solution

Given: $\left[Rn\right]7s^{2}5f^{13}$

Explanations: The electron configuration of an element represents the distribution of electrons and provides relevant information regarding the valance electron. The Electron Configurations are useful for determining the valency of an element and interpreting the spectrum of the element

$\left[Rn\right]7s^{2}5f^{13}$ represents Mendelevium with atomic number 101 which is equal to the number of total electrons present in electronic configuration.

(f)

Interpretation Introduction

Interpretation:

The element which is represented by electron configuration. $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^5$ needs to be determined.

Concept introduction:

The electron configuration of an element describes the distribution of electrons in orbitals.

Answer to Problem 87A

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^5$ represents Bromine

Explanation of Solution

Given: $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^5$

Explanations: The electron configuration of an element represents the distribution of electrons and provides relevant information regarding the valance electron. The Electron Configurations are useful for determining the valency of an element and interpreting the spectrum of the element

$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^5$ represents Brominebecause there are 35 electrons which corresponds to atomic number 35.