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Chapter 1: Q4P (page 7)

How many valence electrons do the following atoms have?

  1. Boron 2. nitrogen 3. oxygen 4. Fluorine

Short Answer

Expert verified

Boron, nitrogen, oxygen, and fluorine have 3, 5, 6, and 7 valence electrons respectively.

Step by step solution

01

Definition of valence electrons

Valence electrons are the electrons present in the last shell of an atom that participates in the bond formation.

02

Calculating the valence electrons of the respective element

Boron-Atomic Number is 5

The electronic configurationis2, 3.

Hence, the valence electrons are 3.

Nitrogen-Atomic Number is 7

The electronic configurationis2, 5.

Hence, the valence electrons are 5.

Oxygen-Atomic Number is 8

The electronic configurationis2, 6.

Hence, the valence electrons are 6.

Fluorine-Atomic Number is 9

The electronic configurationis2, 7.

Hence, the valence electrons are 7.

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Most popular questions from this chapter

Which of the atoms in the molecular models in Problem 20 have

a. three lone pairs? b. two lone pairs? c. one lone pair? d. no lone pairs?

Draw the structure for each of the following:

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b. 2,5-dinitrobenzaldehyde

c. 4-bromo-3-chloroaniline

a. Find potassium (K) in the periodic table and predict how many valence electrons it has.b. What orbital does the unpaired electron occupy?

Predict the approximate bond angles for

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  4. The H-C-O bond angle in CH3OCH3.

What products are obtained when the following tertiary amines react with hydrogen peroxide followed by heat?

a.

b.

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d.
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