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Valence Electrons and Lewis Structures

Valence Electrons and Lewis Structures

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Practice Problem

Hard

Created by

Ethan Morris

FREE Resource

This video tutorial explains how to draw the Lewis structure for SbF4-. It begins by counting the valence electrons of antimony and fluorine, considering the extra electron due to the negative charge. The tutorial then guides viewers through placing the atoms and electrons to form bonds and complete octets. It addresses the concept of expanded octets for antimony, which allows for more than eight electrons. Finally, the video shows how to finalize the structure with brackets and a negative sign to indicate the ion.

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9 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many total valence electrons are there in SBF4-?

34

32

38

36

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many valence electrons does antimony contribute in the SBF4- structure?

3

5

7

9

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What group is fluorine in, and how many valence electrons does it have?

Group 16, 6 electrons

Group 18, 8 electrons

Group 15, 5 electrons

Group 17, 7 electrons

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

Which atom is placed at the center of the SBF4- Lewis structure?

Fluorine

Antimony

Boron

Sulfur

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary role of electrons placed between atoms in a Lewis structure?

To show polarity

To indicate charge

To complete octets

To form chemical bonds

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many valence electrons are used to complete the octets of the fluorine atoms?

24

28

32

34

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the significance of the remaining two valence electrons in the SBF4- structure?

They are shared with another molecule

They are unused

They form a new bond

They expand the octet of antimony

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