David Johnson of The Open University uses balloons to demonstrate the difference between the noble gases in this extract from the BBC/OU programme "Elements Organised: A Periodic Table". Learn more about noble gases at [ Ссылка ]
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David Johnson of The Open University uses balloons to demonstrate the difference between the noble gases in this extract from the BBC/OU programme "Elements Organised: A Periodic Table". Learn more about noble gases at [ Ссылка ]