This question is about the noble gases - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2021 - Paper 1
Question 2
This question is about the noble gases.
(a) (i) State, in terms of outer shell electrons, why the noble gases are unreactive.
(ii) Figure 1 shows an airship, fille... show full transcript
Worked Solution & Example Answer:This question is about the noble gases - Edexcel - GCSE Chemistry Combined Science - Question 2 - 2021 - Paper 1
Step 1
State, in terms of outer shell electrons, why the noble gases are unreactive.
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Answer
The noble gases are unreactive because their outer shell of electrons is full. This complete outer shell configuration makes them stable and less likely to form bonds with other elements.
Step 2
Explain why hydrogen and why krypton are not used in airships.
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Answer
Hydrogen is not used in airships because it is flammable and could ignite, posing a safety risk. Krypton is more dense than air, which means that a krypton-filled airship would not float effectively, as it would not provide enough lift to counteract its weight.
