D block trends
Posted: 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.
Re: D block trends
Posted: 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.