CHAPTER 4 THE PERIODIC TABLE OF ELEMENTS

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4.3 ELEMENTS IN GROUP 18

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Froggy Jumps CHAPTER 4 THE PERIODIC TABLE OF ELEMENTSVersión en línea 4.3 ELEMENTS IN GROUP 18 por I AM IZZAH 1 Which element in Group 18 does NOT have an octet electron arrangement? a Neon b Argon c Helium 2 Why are Group 18 elements chemically unreactive? a They have high density b They have achieved a stable duplet or octet electron arrangement c They are monatomic gases. 3 Which of the following trends occurs when going down Group 18? a Atomic size decreases b Melting and boiling points increase c Reactivity increases 4 Which element is used in cancer treatment as a source of gamma rays? a Xenon b Krypton c Radon 5 A scientist needs a gas to protect hot tungsten filament in a light bulb. Which gas is the best choice? a Oxygen b Nitrogen c Argon 6 Why does xenon react more easily than helium? a Xenon atoms are smaller. b Xenon's outer electrons are further from the nucleus and easier to remove. c Xenon has stronger nuclear attraction. 7 The melting point of noble gases increases down the group because a van der Waals forces become stronger. b the atoms become smaller. c metallic bonding becomes stronger. 8 Which physical property increases down Group 18? a Boiling point b Reactivity c Solubility in water 9 Why are noble gases chemically unreactive? a They have one valence electron. b They have a complete outermost electron shell. c They easily lose electrons. 10 Why are noble gases usually found as single atoms? a They have incomplete electron shells. b They are chemically stable and do not need to bond. c They form strong covalent bonds.

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CHAPTER 4 THE PERIODIC TABLE OF ELEMENTSVersión en línea

4.3 ELEMENTS IN GROUP 18

por I AM IZZAH

Which element in Group 18 does NOT have an octet electron arrangement?

Neon

Argon

Helium

Why are Group 18 elements chemically unreactive?

They have high density

They have achieved a stable duplet or octet electron arrangement

They are monatomic gases.

Which of the following trends occurs when going down Group 18?

Atomic size decreases

Melting and boiling points increase

Reactivity increases

Which element is used in cancer treatment as a source of gamma rays?

Xenon

Krypton

Radon

A scientist needs a gas to protect hot tungsten filament in a light bulb. Which gas is the best choice?

Oxygen

Nitrogen

Argon

Why does xenon react more easily than helium?

Xenon atoms are smaller.

Xenon's outer electrons are further from the nucleus and easier to remove.

Xenon has stronger nuclear attraction.

The melting point of noble gases increases down the group because

van der Waals forces become stronger.

the atoms become smaller.

metallic bonding becomes stronger.

Which physical property increases down Group 18?

Boiling point

Reactivity

Solubility in water

Why are noble gases chemically unreactive?

They have one valence electron.

They have a complete outermost electron shell.

They easily lose electrons.

Why are noble gases usually found as single atoms?

They have incomplete electron shells.

They are chemically stable and do not need to bond.

They form strong covalent bonds.

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CHAPTER 4 THE PERIODIC TABLE OF ELEMENTS

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CHAPTER 4 THE PERIODIC TABLE OF ELEMENTSVersión en línea

por I AM IZZAH

Which element in Group 18 does NOT have an octet electron arrangement?

Why are Group 18 elements chemically unreactive?

Which of the following trends occurs when going down Group 18?

Which element is used in cancer treatment as a source of gamma rays?

A scientist needs a gas to protect hot tungsten filament in a light bulb. Which gas is the best choice?

Why does xenon react more easily than helium?

The melting point of noble gases increases down the group because

Which physical property increases down Group 18?

Why are noble gases chemically unreactive?

Why are noble gases usually found as single atoms?