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# What Is The Electron Configuration Of Fe 3+ + And Why? Electron Configuration For Fe 3+

STEP 2 The ion has a 3+ charge so three electrons are removed. Two are taken from the 4s sub-shell, the other from the 3d sub-shell. So the electron configuration of Fe3+ is: 1s2 2s2 2p6 3s2 3p6 3d5.

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## Which has the stable electronic configuration ni2+ and Fe3+?

Answer. The electronic configuration pf Fe+3 = 3d5. So, as we know that half filled subshells are more stable, Thus we can see that Fe+3 ion will be more stable than Ni+2 , because of more number of exchanges in Half filled subshell.

23 electrons

## How do you calculate electronic configuration?

To calculate an electron configuration, divide the periodic table into sections to represent the atomic orbitals, the regions where electrons are contained. Groups one and two are the s-block, three through 12 represent the d-block, 13 to 18 are the p-block and the two rows at the bottom are the f-block.

## What is meant by electronic configuration?

Electronic configuration, also called electronic structure, the arrangement of electrons in energy levels around an atomic nucleus. In terms of a more refined, quantum-mechanical model, the K–Q shells are subdivided into a set of orbitals (see orbital), each of which can be occupied by no more than a pair of electrons.

## How do you find the electron?

The number of protons, neutrons, and electrons in an atom can be determined from a set of simple rules. The number of protons in the nucleus of the atom is equal to the atomic number (Z). The number of electrons in a neutral atom is equal to the number of protons.

## What is the importance of electronic configuration?

Electron configurations help make predictions about how certain elements will react. An atom is most reactive when its valence shell is not full and most stable when its valence orbitals are full. Elements that have the same number of valence electrons often have similar properties.

## Which has more energy 4s or 3d?

We say that the 4s orbitals have a lower energy than the 3d, and so the 4s orbitals are filled first. The electrons lost first will come from the highest energy level, furthest from the influence of the nucleus. So the 4s orbital must have a higher energy than the 3d orbitals.

## What is 2n square rule?

the maximum number of electrons present in a shell is given by the formula 2n squared, where n is the orbit number or energy level index.

## Does the third shell have 8 or 18 electrons?

The third shell of an atom has 18 electrons only not 8 electrons. You might be confused because first the electrons of 4s are filled and then the 10 electrons of 3d shells are filled. They are filled because of the n-l rule.

## What is electron made up of?

Electrons are fundamental particles so they cannot be decomposed into constituents. They are therefore not made or composed. An electron acts as a point charge and a point mass.