Identification of the number of “dots” present in the Lewis symbol for the element oxygen, a Group VIA element. Concept Introduction: The electrons present in the outermost shell of the atom are known as valence electrons. Valency electrons are important because: The valence electrons decide the reactivity of an element. The valence electrons decide the way an atom forms a bond with another atom. The valence electron in an atom decides the combining capacity of the element. Except inner transition elements valence electrons are present in s or p subshells of elements. For inner transition elements incompletely filled d or f subshells electrons are considered as valence electrons. Lewis Dot structure: It is a diagram that shows the valence electrons in an element.

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Chapter 4.2, Problem 4QQ

Interpretation Introduction

Interpretation:

Identification of the number of “dots” present in the Lewis symbol for the element oxygen, a Group VIA element.

Concept Introduction:

The electrons present in the outermost shell of the atom are known as valence electrons.

Valency electrons are important because:

The valence electrons decide the reactivity of an element.

The valence electrons decide the way an atom forms a bond with another atom.

The valence electron in an atom decides the combining capacity of the element.

Except inner transition elements valence electrons are present in s or p subshells of elements.

For inner transition elements incompletely filled d or f subshells electrons are considered as valence electrons.

Lewis Dot structure:

It is a diagram that shows the valence electrons in an element.

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