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Question
What is the main characteristic of the last element in each period of the periodic table?
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Solution
The last element in each period of the periodic table is a gaseous element with its valence shell completely filled. Except for helium, which has a complete duplet configuration, all five gases have a complete octet configuration.
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RELATED QUESTIONS
The position of three elements A, B and C in the Periodic Table are shown below –
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Group 16
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Group 17
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A
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B
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C
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(a) State whether A is a metal or non-metal.
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Bisulphate
