Electron configuration for an element gives an idea about distribution of electrons in atomic orbitals. Let us study the electron configuration in below steps.

**The Electron configuration of Nobelium is [Rn] 5f ^{14} 7s^{2}. Nobelium (No) has atomic number 102 and is prepared synthetically in the particle accelerators. It is a radioactive, f block element which is the 10^{th} transuranic element. The known isotopes of Nobelium to exist are thirteen.**

In the following article, the Electron configuration, rules required for describing electron configuration and orbital diagrams for Nobelium will be elaborated step by step.

**How to write Nobelium electron configuration?**

**The electron configuration of No is** **1s ^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{10} 5p^{6} 6s^{2} 4f^{14} 5d^{10} 6p^{6} 7s^{2} 5f^{14 }.**

**The electron configuration is derived using the following steps illustrated below:**

**s orbital can hold up to 2 electrons.****p orbital can hold up to 6 electrons****d orbital can hold up to 10 electrons, and****f orbital can hold up to 14 electrons.**

**The electrons are filled in the respective shells using****Aufbau’s principle****,****Hund’s rule****and****Pauli’s exclusion principle****.****Thus, the electron configuration of No is****1s**.^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{10}5p^{6}6s^{2}4f^{14}5d^{10}6p^{6}7s^{2}5f^{14 }

**Nobelium electron configuration diagram**

**The electron configuration of No is** **1s ^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{10} 5p^{6} 6s^{2} 4f^{14} 5d^{10} 6p^{6} 7s^{2} 5f^{14 }.**

**The diagram drawn is as follows:**

**Nobelium electron configuration notation**

**The electron configuration of No is 1**s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{10} 5p^{6} 6s^{2} 4f^{14} 5d^{10} 6p^{6} 7s^{2} 5f^{14} which is written in two ways as mentioned below:

**With respect to noble gas****Radon****[Rn] 5f**^{14}7s^{2 }**In terms of atomic orbitals****1**s^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{10}5p^{6}6s^{2}4f^{14}5d^{10}6p^{6}7s^{2}5f^{14}

**Nobelium unabbreviated electron configuration**

**The unabbreviated electron configuration for No is 1s ^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{10} 5p^{6} 6s^{2} 4f^{14} 5d^{10} 6p^{6} 7s^{2} 5f^{14} .**

**Ground state Nobelium electron configuration**

**The ground state electron configuration of No is 1s ^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{10} 5p^{6} 6s^{2} 4f^{14} 5d^{10} 6p^{6} 7s^{2} 5f^{14} .**

**Excited state of Nobelium electron configuration**

**The excited state electron configuration of No is 1s ^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 4s^{2} 3d^{10} 4p^{6} 5s^{2} 4d^{10} 5p^{6} 6s^{2} 4f^{14} 5d^{10} 6p^{6} 7s^{0} 5f^{14} 7p^{2 }.**

**Ground state Nobelium orbital diagram**

**The ground state orbital diagram for No is drawn using the following steps:**

**At first, with respect to increasing order of energies arrange the orbitals.****The electrons are then filled in the orbitals as per Aufbau’s principle, Hund’s rule and Pauli’s exclusion principle.****The ground state orbital diagram of No representing the electron configuration 1s**^{2}2s^{2}2p^{6}3s^{2}3p^{6}4s^{2}3d^{10}4p^{6}5s^{2}4d^{10}5p^{6}6s^{2}4f^{14}5d^{10}6p^{6}7s^{2}5f^{14}is illustrated as follows:

**Conclusion:**

The electron configuration is very necessary to obtain information about an element’s magnetic property and oxidation state. Nobelium was found to behave as the heaviest homolog of ytterbium. Nobelium is only used for research purposes.

**Also Read:**

- Xenon electron configuration
- Ag electron configuration
- Uranium electron configuration
- Protactinium electron configuration
- Molybdenum electron configuration
- Arsenic electron configuration
- Zirconium electron configuration
- Cesium electron configuration
- Copper electron configuration
- Tin electron configuration

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