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Electron configuration is the arrangement of electrons in orbitals of an atom according to specific rules. It can be done through Aufbau principle, Hund’s principle and Pauli’s exclusion principle.

Tennessine (Ts), formerly ununseptium, is the second-heaviest man-made element and penultimate element of group 17 of the periodic table. It was discovered in 2009 by a collaboration of Russian and American scientists.

The element has two stable isotopes: Ts-294 and Ts-293. Ts-294 has a half-life of about 51 milliseconds and is the most stable. It is also the rarest of all the elements, with a total of 15 tennessine atoms detected so far as of 2016.

Chemical properties

Although tennessine is classified as a halogen, its chemical properties are not very similar to those of halogens. Its valence electrons have relativistic effects that prevent it from forming anions and attaining high oxidation states.

Electronic configuration

The electronic configuration of tennessine is a mixture of 1s, 2s and 3d orbitals. The s-orbital has the lowest energy and can only accommodate a maximum of two electrons, while the 3d orbital has the highest energy and can accommodate a maximum of six electrons.

Electron configuration through orbitals

The electrons of tennessine are arranged in a particular order in atomic orbitals, through the use of different principles like Aufbau principle, Hund’s principle and Pauli’s principle. These principles help to make a complete orbital diagram of an atom.