Valence Electrons and Chemical Bonds

Valence Electrons and Chemical Bonds

Assessment

Interactive Video

Chemistry

9th - 10th Grade

Hard

Created by

Patricia Brown

FREE Resource

The video tutorial explains the concept of valence electrons, their importance in chemical reactions, and how organic chemists visualize them using Lewis structures. It introduces the octet rule, which states that atoms are most stable with eight valence electrons, and discusses exceptions to this rule. The tutorial also covers how atoms bond by sharing electrons to achieve stability, using examples like hydrogen and nitrogen.

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10 questions

Show all answers

1.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What makes valence electrons unique compared to other electrons in an atom?

They are always paired.

They participate in chemical reactions.

They are responsible for the atom's mass.

They are found in the innermost energy level.

2.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the primary purpose of Lewis structures in chemistry?

To calculate atomic mass.

To visualize valence electrons.

To determine the number of protons.

To measure atomic radius.

3.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

How many valence electrons does a carbon atom have?

Two

Four

Six

Eight

4.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

In a Lewis structure, what does each dot around an atom's symbol represent?

A neutron

A proton

A valence electron

An atomic bond

5.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the total number of valence electrons in an oxygen atom?

Seven

Six

Five

Four

6.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

According to the octet rule, how many valence electrons do most atoms seek to achieve for stability?

Eight

Six

Four

Two

7.

MULTIPLE CHOICE QUESTION

30 sec • 1 pt

What is the main reason atoms form chemical bonds?

To become radioactive

To change their atomic number

To achieve a stable electron configuration

To increase their mass

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