# Electron Configuration Question

In summary, the electron configurations are symbolized by spdf (spherical, partial, double-filled) and 2 8 8 2 (two octets, eight subshells, two elements). The difference between the two is that spdf is a symbol of the orbital electron configuration, while 2 8 8 2 is a symbol of the elemental electron configuration.
There are two kind of electron configuration as I read so far.
There are one such as spdf and other such as, for example, 2 8 8 2.
What is the name of these electron configurations?
What is the difference?

spdf are symbols of orbitals, it is not a symbol of the "configuration". I am not sure what the numbers listed are intended to mean - probably total number of electrons on the shell. No idea if it has any specific name.

Hard to explain details without lecturing on what the configuration really is. Read on and things should get clear at some point.

Electron configurations are derived from Atomic Models... The Bohr (Concentric Ring) Model specifies electron configurations with respect to the number of electrons per 'major' energy levels... That is, for any given energy level, the maximum number of electrons a major energy level can hold is given by the expression 2n2 => n=1 => 2(1)2 = 2e- max; n=2 => 2(2)2 = 8e- max; n=3 => 2(3)2 = 18e- max; etc... For any given element, electrons are added into the n = 1 first, then n = 2, n = 3; etc. Such gives the (2,8,8,2) configuration for element #20 (calcium) ... Adding electrons beyond At. No. 20 fills in the n = 3 energy level until 18 total electrons are placed then n = 4 in the 4th row is completed with 8 electrons, then n=5 and so on.

For the orbital electron configurations, the notations describe electron configurations for the Schrodinger Quantum Model. The filling scheme is defined by The Aufbau Principle which states 'In the building up process of the atom's electron configuration, electrons enter at the lowest available energy level'. Such follows, in general, the order-of-filling scheme known as the Aufbau Diagram. Example, [N]1s22s22p3 and so on... Whew! Borek's right, this can run into a day long lecture... Suggest searching history of atomic models... You should find some good treaties on the evolution of electron configurations.

## 1. What is electron configuration?

Electron configuration is the arrangement of electrons in an atom's energy levels or orbitals. It determines the chemical and physical properties of an element.

## 2. How do you write electron configuration?

Electron configuration is written using the notation of the energy level (n), followed by the type of orbital (s, p, d, or f) and the number of electrons in that orbital. For example, the electron configuration of carbon is 1s2 2s2 2p2.

## 3. What is the significance of electron configuration?

Electron configuration determines the chemical reactivity and bonding behavior of an element. It also explains the periodic trends in the properties of elements.

## 4. How do you determine the electron configuration of an element?

The electron configuration of an element can be determined by using the periodic table and following the Aufbau principle, Hund's rule, and the Pauli exclusion principle. Alternatively, it can also be found using electron configuration charts or online calculators.

## 5. Can electron configuration change?

Electron configuration can change when an atom gains or loses electrons, forming ions. It can also change during chemical reactions, where electrons are shared or transferred between atoms.

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