Element A with the electronic configuration of 2, 8, 1 is a metal. This is because metals tend to have 1, 2 or 3 electrons in their outermost shell and are more likely to lose electrons to achieve a stable electron configuration.

On the other hand, element B with the electronic configuration of 2, 8, 7 is a non-metal. Non-metals usually have 5, 6 or 7 electrons in their outermost shell and are more likely to gain electrons to achieve a stable electron configuration.

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Element A with the electronic configuration of 2, 8, 1 is a metal. This is because metals tend to have 1, 2 or 3 electrons in their outermost shell and are more likely to lose electrons to achieve a stable electron configuration.

On the other hand, element B with the electronic configuration of 2, 8, 7 is a non-metal. Non-metals usually have 5, 6 or 7 electrons in their outermost shell and are more likely to gain electrons to achieve a stable electron configuration.

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Element A with the electronic configuration of 2, 8, 1 is a metal. This is because metals tend to have 1, 2 or 3 electrons in their outermost shell and are more likely to lose electrons to achieve a stable electron configuration.

On the other hand, element B with the electronic configuration of 2, 8, 7 is a non-metal. Non-metals usually have 5, 6 or 7 electrons in their outermost shell and are more likely to gain electrons to achieve a stable electron configuration.

The electronic configurations of two elements A and B are 2, 8, 1 and 2, 8, 7respectively. Which one of them is a metal and which is a non-metal?

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