Problem: Name the element described in the following: Forms 2+ ion with electron configuration [Ar] 3d3.

🤓 Based on our data, we think this question is relevant for Professor Davidson's class at UTSA.

FREE Expert Solution

Neutral element:       Atomic number = # protons = # of electrons

  • Cation with charge = 2+: lost 2 electrons
  • Recall:

s orbital  can hold a maximum of 2 electrons

p orbitals → can hold a maximum of 6 electrons

d orbitals → can hold maximum of 10 electrons

f orbitals → can hold maximum of 14 electrons


Electron configuration: [Ar]3d3

  • [Ar]: atomic # = 18 18 e
    • [Ar] = 1s22s22p63s23p6 
  • 3d3 3 ein d orbital

Total electrons in cation = 18 + 3 = 21

Total electrons of neutral element = 21 + (2) = 23

  • electron configuration of neutral element: 1s22s22p63s23p64s23d3
  • transition metals lose e- from highest energy orbital (4s)
    • s orbital first before the d orbital
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Problem Details

Name the element described in the following: Forms 2+ ion with electron configuration [Ar] 3d3.

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Our tutors have indicated that to solve this problem you will need to apply the Electron Configuration concept. You can view video lessons to learn Electron Configuration. Or if you need more Electron Configuration practice, you can also practice Electron Configuration practice problems.

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Based on our data, we think this problem is relevant for Professor Davidson's class at UTSA.

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Our data indicates that this problem or a close variation was asked in Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition. You can also practice Chemistry: The Molecular Nature of Matter and Change - Silberberg 8th Edition practice problems.