Question

Element A and B with their respective electronic configurations $3d^{10}4s^1$ and $4d^{10}5s^1$ in their outermost shell are

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

Answer 1

The correct option is A Both coinage metals

$3d^{10}4s^1$ this belongs to copper electronic configuration.

and $4d^{10}5s^1$ this belongs to silver electronic configuration.

so both are coinage metals.