Chemistry

Grade-9

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Question

Choose the correct electron configuration for cobalt(Co = 27).

[Ar]4s¹ 3d⁸
[Ar]4s² 3d⁷

[Ar]4s² 4d⁷
[Ar]4s² 4p⁶3d¹

hint Hint:

The electronic configuration of cobalt is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{7}$

The correct answer is: [Ar]4s² 3d⁷

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{7}$ that has the energy levels and subshells occupied by the electrons according to the Aufbau principle.

The ground state electronic configuration of Cu is

ChemistryGrade-9

Grade-9

Chemistry

Predict the characteristic of transition elements(Ti to Cu) of atomic number 22 to 29.

ChemistryGrade-9

Grade-9

Chemistry

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Choose the correct electron configuration for cobalt(Co = 27).

[Ar]4s1 3d8[Ar]4s2 3d7 [Ar]4s2 4d7[Ar]4s2 4p63d1

The electronic configuration of cobalt is 1s22s22p63s23p64s23d7

The correct answer is: [Ar]4s2 3d7

that has the energy levels and subshells occupied by the electrons according to the Aufbau principle.

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[Ar]4s¹ 3d⁸
[Ar]4s² 3d⁷

[Ar]4s² 4d⁷
[Ar]4s² 4p⁶3d¹

The electronic configuration of cobalt is $1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{7}$

The correct answer is: [Ar]4s² 3d⁷

$1 s^{2} 2 s^{2} 2 p^{6} 3 s^{2} 3 p^{6} 4 s^{2} 3 d^{7}$ that has the energy levels and subshells occupied by the electrons according to the Aufbau principle.

Indicate electron configuration of Mn³⁺ ion. (Mn = 25).

Indicate electron configuration of Mn³⁺ ion. (Mn = 25).