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The electron configuration for an O2- ion is 1s22s22p6 just like the noble gas neon.

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Q: What is the lowest energy excited state electron configuration of O2?
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When you say an electron is in its ground state what does that mean?

when something is in the ground^No. That is totally incorrect.Basically, a ground state electron is when the atom/element is not being surged through with heat or electricity. Basically, it's the atom's normal electron configuration. So NA [Sodium]'s ground state would be shown as : 1s2, 2s2, 2p6, 3s1.The opposite is when it's in it's excited state. You can remember tell when an atom is in it's excited state when in the electron configuration, there is a huge jump, like 1s2,2s2,2p5, 3s2. This might have happened due to being exposed to heat and or electricity.In other words, ground state=normal, excited is, well, excited. XD


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An atom in which an electron has moved up to a higher level is in an excited state. The lowest state of the atom is called the ground state.Ê


What is the set of numbers that shows the arrangement of electrons in their shells?

The set of numbers that shows the arrangement of electrons in their shells is known as the electron configuration. It is based on the principle that electrons fill the lowest energy levels first before moving to higher energy levels. The electron configuration is typically represented by a series of numbers and letters indicating the number of electrons in each energy level and orbital.


What is the difference between the ground state of an atom and excited state of an atom?

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In the ground state all the (only one for Hydrogen)) electrons is in the lowest stable orbit. If the electron gains energy (usually from a photon) it will orbit in a higher energy state (called excited).


General electronic configuration of group having low ionisation energy?

The general electron configuration of the group having the lowest ionization energy is [Noble gas configuration]xs1. In this case, x is the principal quantum number of the valance electron. The noble gas configuration may either be written out in full or denoted by the noble gas' atomic symbol in brackets (ie [Ne]).


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What is the difference between excited hydrogen atom and any other atom?

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Is there any other energy state aside from the lowest energy state for an electron?

Yes, while nature will always try to place electrons in their lowest energy configuration, electrons can temporarily occupy higher energy states. When they fall back to the lowest energy state, the difference in energy is released as light - "a photon". Different colors of light reflect differing energy state jumps made by electrons.


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