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Question

Element A and B with their respective electronic configurations 3d104s1 and 4d105s1 in their outermost shell are

A
Both coinage metals
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B
Both non-metals
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C
A is a non-metal and B is coinage metal
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D
A is a coinage metal and B is non-metal
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Solution

The correct option is A Both coinage metals
3d104s1 this belongs to copper electronic configuration.
and 4d105s1 this belongs to silver electronic configuration.
so both are coinage metals.

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