FOUND.OF COLLEGE CHEMISTRY
FOUND.OF COLLEGE CHEMISTRY
15th Edition
ISBN: 9781119234555
Author: Hein
Publisher: WILEY
Question
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Chapter 10, Problem 44PE

(a)

Interpretation Introduction

Interpretation:

The complete electronic configuration of Selenium has to be given.

Concept Introduction:

Aufbau’s principle:

Aufbau’s principle states that electrons are filled into atomic orbitals in the increasing order of orbital energy level.  According to the Aufbau principle the available atomic orbitals with the lowest energy levels are occupied before those with higher energy levels.

FOUND.OF COLLEGE CHEMISTRY             , Chapter 10, Problem 44PE

Figure 1

(b)

Interpretation Introduction

Interpretation:

The shorthand electronic configuration of selenium has to be given.

(c)

Interpretation Introduction

Interpretation:

The number of valence electrons in selenium has to be given.

Concept Introduction:

Valence electrons:

Valence shell is the outermost shell of an every element.  Atom of every element has different electronic configurations based on the atomic number of each element.  Valence electrons are those electrons that located in the outermost shell surrounding an atomic nucleus.

Example: Sodium

The atomic number of sodium is 11.

The electronic configuration of sodium is 1s22s22p63s1.

The outermost shell (valence shell) is 3s.

The valence electron is one.

(d)

Interpretation Introduction

Interpretation:

The valence electrons in the shorthand electronic configuration have to be underlined.

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Chapter 10 Solutions

FOUND.OF COLLEGE CHEMISTRY

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