Exploring the Concept of Valency in Atoms and Molecules

Why do atoms participate in bond formation?

• To change their color

• To decrease their energy

• To reach a stable state

• To increase their mass

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What is the stable state for atoms with only one shell?

• When it has eight electrons

• When it has two electrons

• When it has six electrons

• When it has four electrons

What is valency?

• The number of neutrons in an atom

• The atomic mass of an element

• The combining capacity of an element

• The number of protons in an atom

How does Hydrogen achieve a stable state?

• Both B and C

• By gaining one electron

• By losing one electron

• By sharing one electron

What is the valency of Oxygen?

• 1

• 2

• 3

• 4

How does Magnesium achieve a stable state?

• By gaining two electrons

• By sharing two electrons

• By losing two electrons

• By gaining six electrons

What is the electronic configuration of Sodium?

• 2, 8, 2

• 2, 8, 1

• 2, 7, 1

• 2, 6, 2

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How do Sodium and Chlorine achieve stability in Sodium chloride?

• Sodium gains one electron and Chlorine loses one electron

• Both gain one electron

• Sodium loses one electron and Chlorine gains one electron

• Both share one electron

What is the valency of Chlorine?

• 3

• 2

• 1

• 4

How do Hydrogen and Oxygen combine to form water?

• By not interacting

• By losing electrons

• By gaining electrons

• By sharing electrons

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