Question

A transition metal ion x has the electronic configuration [ar]3d . What is the atomic number of the element?

Answer 1

Answer:

26

Explanation:

For starters, you know that your element is located in period 4 of the Periodic Table because all the transition metals that have 3dconfigurations are located in period 4 of the Periodic Table.

This means that you can write the noble-gas shorthand configuration for this unknown element, let's say X, like this

X3+:[Ar]3d5

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