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Half and fully filled orbitals are more stable that other configurations. Because of this, the d orbital will take an extra electron from the s orbital in order to make it more stable.

The actual configuration would be 5s1 4d4.

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Q: Why in nb the 4d orbital should not cantain 3 electrons?
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Related questions

What is the orbital of the element yttrium?

The valence electrons fill in 4d orbital The electron configuration of yttrium is [Kr]4d15s2.


Which orbital is rhodium's last electron in?

If you are filling in the electrons it will be in the 4d orbital. If you are removing electrons the first to come out is in the 5s electrons since transition metals lose 's' electrons before 'd' electrons


Why does one electron in a rubidium atom occupy a 5s orbital rather than a 4d or 4f orbital?

in 5s it is filled but in 4d or 4s its half


How would the 4d orbitals differ from the 3d orbitals?

The 4d orbital would be the same shape as the 3d orbital, but just a larger size. Also it would have more nodes than he 3d orbital.


What element has three 4d electrons?

Niobium (Nb) Because three 4d electrons = 3d^3


What is the Maximum number of electrons into 4d orbital?

There are 5 total 4 d orbitals. (4dy, 4dx, 4dz, 4dz2, 4dx2-y2) Each of these can fit 2 electrons. This rule is known as the Pauli Exclusion Principal. 2X5 = 10. 10 total electrons. This is the same for all d orbitals. 1d, 2d, 3d, 4d, 5d, etc.


How many electrons can be acomodated in a 5d orbital?

The d sublevel always contains 5 orbitals. Therefore the d sublevel can accommodate 10 electrons just the same as 3d and 4d orbitals. Each of the 5 separate d orbitals can only contain two electrons.


What is the type of hybridization of Br in BrF5?

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What is the maximum number of electrons that can occupy the n equals 4 energy level?

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Why does an electron occupy the 4s orbitals before the 3rd orbital?

Because the 4d electrons experience a lower effective charge from the nucleus at this point than the 5s electrons. Long story is that it has to do with the energy lost from spin-pairing. That means that it takes more energy to spin-pair the 5s electron than the energy difference between the 4d and 5s orbitals, so it will push the electron up to the 4d orbital since it requires slightly less energy. At the periods containing cromium and copper, this is where that effect takes place. You can demonstrate this to yourself by calculating the Z(eff) for the electrons using Slater's Rule, and you will see the change in Z(eff) for yourself.


What is the number of 4d electrons in Mo?

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How many 4d electrons are in Iodine?

27