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22-01-2020
Chemistry

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For atoms in the ground state, electrons begin filling the 3d sublevels starting with 1. Sr and ending with Cd 2. Sc and ending with Cd 3. Sr and ending with Cu 4. Sc and ending with Cu

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22-01-2020

Answer: Sc and ending in Cu

Explanation: The 3d orbital is right next to the 4s orbital. So 3d starts with Sc Scandium which is 3d¹ and moves to the right to Cu Copper which is 3d9. The d orbital shell can occupy a maximum of 10 electrons. The 3d orbital actually ends up with Zn Zinc.

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