Noble Gases

• Chemistry
• Secondary Education

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Topic 8 - Non-metals

Group VIII or Group 0 Elements

27 November 2025

How do you feel today?

😒🙁😐🙂😃

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In this lesson, I will:

• describe the Group VIII (noble gases) as unreactive, monatomic gases and explain this in terms of electronic configuration.

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Some advertising signs use bright lights to make them more visible to customers.

Real-world Connection

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Explain, in one sentence, why neon gas is 

used in some AD signs, NOT natural air?

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Work in pairs to answer the following MC questions about noble gases.

Group VIII elements are also known as _________.

1. halogens
2. pnictogens
3. chalcogens
4. noble gases

Which of the following is NOT a property of Group VIII elements?

1. They are monatomic gases.
2. They are all colourless gases.
3. They are very reactive.
4. They exist as individual atoms rather than forming molecules.

Which noble gas, represented by its electronic configuration, is used (rather than hydrogen) in lighter-than-air balloons because its lack of reactivity means it will not ignite? 

1. 2
2. 2, 4
3. 2,7
4. 2, 5

Why is hydrogen gas NOT used in balloons?

Which noble gas, represented by its electronic configuration, produces the brightest light in advertising signs?

1. 2
2. 2, 8
3. 2,8, 8
4. 2, 5

Which noble gas, represented by its electronic configuration, is also used when welding to prevent oxygen from getting to the hot metal and causing corrosion?

1. 2
2. 2, 8
3. 2,8, 8
4. 2, 6

Which noble gas, represented by its electronic configuration, is the least dense in Group VIII?

1. helium
2. neon
3. krypton
4. argon

Which noble gas, represented by its electronic configuration, is the most dense in the following list?

1. helium
2. xenon
3. krypton
4. neon

TEMPLATE

In this lesson, I will:

• describe the Group VIII (noble gases) as unreactive, monatomic gases and explain this in terms of electronic configuration.

How well did you participate 

in the lesson today?

05

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Works in small groups to conduct an experiment, collect data or test a hypothesis

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makes sense of the explore experience; helps students clarify their understanding and introduces formal science terminology and concepts based on their findings

sample

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Presents a new problem or scenario that requires students to apply their knowledge. For instance, after studying ecosystems, the teacher might ask students to explore the effects of an oil spill.

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Assesses student comprehension through a worksheet, quiz, a lab report, or a concluding class discussion.