D block trends

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Bryce Ramirez 1J
Posts: 120
Joined: Sat Aug 24, 2019 12:16 am

D block trends

Postby Bryce Ramirez 1J » Mon Oct 28, 2019 3:56 pm

When saying how many electrons there are for an element in the d block, how do you know when to write the electron configuration without the s block and transfer those electrons to the d block. For Ru^+3, the electron configuration is [Kr] 4d^5, but this uses the two electrons from the 5s^2 and puts them into the d block.

Amy Pham 1D
Posts: 103
Joined: Fri Aug 09, 2019 12:15 am

Re: D block trends

Postby Amy Pham 1D » Mon Oct 28, 2019 6:25 pm

When writing the electron configurations for ions, look initially at the electron configuration for the neutral parent atom. In the case of Ru3+, this would be Ru's electron configuration being [Kr] 4d7 5s1. After finding this, you remove 3 electrons from the logical highest energy shells and subshells, which would result in the electron configuration for Ru3+ being [Kr] 4d5.

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