Chapter 6.2, Problem 15LC

(a)

Interpretation Introduction

Interpretation:Element is to be identified as representative elements, transition elements, or noble gas.

Concept introduction:

The electron configuration of an element defines how its electrons are arranged throughout its atomic orbitals. Standard notation is used to represent atomic electron configurations, placing all electron-containing atomic subshells in sequential order. The number of electrons held by the subshell is indicated by superscript.

Answer to Problem 15LC

Noble gas

Explanation of Solution

The given electronic configuration is,$1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{10}4s^{2}4p^6$

The outer shell contains 8 electrons, so its octet is complete. Thus, it is a noble gas.

(b)

Interpretation Introduction

Interpretation:Element is to be identified as representative elements, transition elements, or noble gas.

Concept introduction:

The electron configuration of an element defines how its electrons are arranged throughout its atomic orbitals. Standard notation is used to represent atomic electron configurations, placing all electron-containing atomic subshells in sequential order. The number of electrons held by the subshell is indicated by superscript.

Answer to Problem 15LC

Transition element

Explanation of Solution

The given electronic configuration is,

  $1s^{2}2s^{2}2p^{6}3s^{2}3p^{6}3d^{6}4s^2$

The last enters into d-subshell thus, it is a transition metal.

(c)

Interpretation Introduction

Interpretation:Element is to be identified as representative elements, transition elements, or noble gas.

Concept introduction:

The electron configuration of an element defines how its electrons are arranged throughout its atomic orbitals. Standard notation is used to represent atomic electron configurations, placing all electron-containing atomic subshells in sequential order. The number of electrons held by the subshell is indicated by superscript.

Answer to Problem 15LC

Representative element

Explanation of Solution

The given electronic configuration is,$1s^{2}2s^{2}2p^{6}3s^{2}3p^2$

The outermostelectrons enterthe p-subshell. So, it is a p-block element. The p-block element is called a representative element.

Thus, the given electronic configuration belongs to a representative element.