Sr electron configuration | Strontium electron configuration

Strontium is an alkaline earth metal. It is a non-radioactive element in group 2 (IIa) of the sr periodic table. It comes in three different allotropic crystalline forms and shares physical and chemical properties with calcium and barium.

It is a chemical element in the human body that is concentrated in the bones in about 99% of the body. Strontium chloride is the most frequent type of Strontium used in nutritional supplements, and several distinct forms of Strontium are utilized in medicine.

Strontium is a soft, silvery metal that burns in the air and reacts with water. It is well recognized for the bright reds that its salts produce in fireworks and flares. It’s also used in the manufacture of ferrite magnets and the refinement of zinc and in modern ‘glow-in-the-dark’ paints and polymers. Most Strontium is employed as carbonate in television screens and other visual display systems. Despite being a severely radioactive isotope, strontium-90 is a beneficial by-product of nuclear reactors from which spent fuel is removed. Its high-energy radiation may generate an electric current, making it suitable for use in spacecraft, distant weather stations, and navigation buoys.

Strontium is a chemical element with an atomic weight of 38 and is represented by ‘sr’ in short. It belongs to an alkaline earth metal group. It has a silvery-white and yellowish metallic aspect and is velvety. The element strontium is extremely reactive. Strontium forms a black oxide coating when exposed to air.

In chemistry, Strontium Electron Configuration is the number of electrons in the orbits of the atom or molecules. Strontium Electron Configuration is the distribution of electrons in the orbital of an atom of Strontium. It is also known as sr electron configuration.

Electron configuration of Strontium

The placement of electrons in an element’s orbitals is shown by its electron configuration. The number of electrons in an atom and the number of electrons in each orbital are vividly displayed in electron configurations.


The electron configuration is most commonly used to describe an atom’s orbitals in its ground state, but it can also be used to represent an atom that has ionized into a cationic or anionic species by accounting for electron deficits or surpluses in subsequent electron shells.


Each orbital’s number of electrons is provided in superscript to the right of its name, and each orbital is listed in alphabetical order. Many physical and chemical properties of an element can be connected to its electron configuration. The valence electrons, which are electrons in the outermost shell, determine the chemistry of an element.


Electron configuration Strontium can be represented in two ways, they are:

  • The electrons’ orbital configuration (Bohr principle)
  • Electrons are configured using the orbital principle (Aufbau principle)

Sr Periodic Table

In Sr Periodic Table, Strontium belongs to the group 2 elements along with Be, Mg, Ca, and Ba.

Orbital Electron Configuration

Using Sr periodic table, we can make a strontium electron configuration. Niels Bohr, a scientist, was the first to propose a model for the atom’s orbit. In 1913, he proposed a model of the atom. There is a comprehensive description of the orbit there. The electrons in an atom journey in a circular path around the nucleus.

The orbits in Sr Electron Configuration are expressed by n. [n = 1,2,3,4 . . . The serial number of the orbit] K is the name of the first orbit, L is the second, M is the third, and N is the name of the fourth orbit. The electron holding capacity of each orbit is 2n2.

We need to understand the orbit electron configuration for Sr electron configuration or electron configuration strontium of any elements. The electrons in an atom circle the nucleus in a circular pattern.

  • The electron storage capacity of the K orbit is 2n2 = 2 12 = 2 electrons.
  • The electron-carrying capacity of the L orbit is 2n2 = 2 22 = 8 electrons.
  • The maximum electron retention capacity in the M orbit is 2n2 = 2 32 = 18 electrons.
  • The greatest electron retention capacity in the N orbit is 2n2 = 2 42 = 32 electrons.

Strontium has an atomic number of 38, which means that every strontium atom has 38 protons in its nucleus. The number of protons and electrons in a neutral atom is equal, so a neutral atom of strontium would have 38 electrons.

Electrons in elements 1 to 18 can be precisely ordered using orbits. According to the Bohr atomic model, the electron configuration of an element with an atomic number greater than 18 cannot be properly predicted.

Hence, The electron configuration strontium in its ground state is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2.

What is Strontium's Electron Configuration?

The electron configuration strontium in its ground state is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2. The final shell of Strontium possesses two electrons, as shown by this electron configuration. As a result, Strontium has two valence electrons.

During bond formation, elements with 1, 2, or 3 electrons in the last shell donate the electrons in the last shell. Cations are the elements that create bonds by donating electrons. A strontium ion (Sr2+) is formed when a strontium atom contributes two electrons from the final shell to form bonds. In other words, Strontium is a cation element.

What is the number of Valence Electrons in Strontium?

The first shell in Strontium has a maximum electron holding capacity of two, the second shell has an electron holding capacity of eight, and the third shell has an electron holding capacity of eighteen. The atomic number of an element is the number of electrons it contains. Hence, it has an atomic number of 38. It can also be represented as [Kr] 5s2.


In the outermost shell of an atom, electrons are found, also known as valence electrons. Strontium has a total of 38 electrons. These elements can be found in five of the shell’s orbits. The electron distribution is 2, 8, 18, 8, and 2. Because the outermost shell of Strontium has two electrons, the number of valence electrons is two.


To sum it up, the electron configuration Strontium is 1s2 2s2 2p6 3s2 3p6 3d10 4s2 4p6 5s2 or it can also be represented as [Kr] 5s2. Strontium is found in nature in the sulfate mineral celestite (SrSO4) and the carbonate strontianite, accounting for around 0.034 percent of all igneous rock (SrCO3). The Aufbau Principle is used to write the sr electron configuration or the electron configuration of any component. Electrons are filled according to the increasing energy level of orbitals in the Aufbau Principle.