Question

The ground electron configuration of a tc atom is [kr]5s24d5. what is the electron configuration of a tc3+ ion?

Answer 1

Answer

$[kr]4d^4$

Explanation

Given that the tc atom has electronic configuration $tc=[kr]5s^24d^5$ we find the electronic configuration of the ion as follows

Step 1

Because the 5s orbital is further away than the 4d from the nucleus , during the ionization process the two 5s electrons will be removed first. As as result the $tc^{2+}$  has electronic configuration $[kr]4d^5.$

Step 2

All that is left is to remove one more electron. This electron is removed from the 4d orbital. As a result, the $tc^{3+}$ ion has electronic configuration

$tc^{3+}=[kr]4d^4.$

Answer 2

Answer:

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Explanation:

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