Platinum ion electron configuration

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i_love_science

Homework Statement: Write the electron configuration for platinum ion in Pt(NH3)2Cl2.

The answer is [Xe] 4f14 5d8. Why does platinum (and other 6th and 7th period d-block elements) have 4f14 instead of 4f7? Thanks.

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TeethWhitener

Science Advisor

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How many electrons does your configuration have? How many does a platinum atom need to be neutral?