Question

Write the corresponding electron configuration for the pictorial representation The Tube Tu Put Tu Tu Tu pd I 11111 45 3d. Give the full electron configuration. Do not use the noble gas abbreviation. full electron configuration: Name the element, assuming that the configuration describes a neutral atom. name of element:

Answer 1

1s,2s,2p,3s,3p,4s and 3d are the subshells of an atom.

An s-subshell consists of 1 orbital and each orbital can accommodate a maximum of two electrons only so an s-subshell can have a maximum of two electrons only. ( In the pictorial representation of electron configuration , an electron is represented by an arrow and the two different directions of arrows represent two different spins of electrons , one has +1/2 spin and the other has -1/2 spin. )

A p-subshell consists of three p-orbitals and since each orbital can accommodate a maximum of two electrons so p-subshell consisting of three p orbitals can accommodate a maximum of six electrons.

A d-subshell consists of five d-orbitals which can accommodate a maximum of ten electrons.

The full electron configuration is written by denoting the number of electrons contained in an orbital as a superscript of that orbital and the various orbitals are arranged in an increasing order of energy .

Here , 1s orbital contains 2 electrons , 2s orbital contains 2 electrons, 2p orbitals contain 6 electrons , 3s orbital contains 2 electrons, 3p orbitals contain 6 electrons , 4s orbital contains one electron and the last 3d orbitals contain 5 electrons .

So the full electron configuration will be written as

1s²2s²2p⁶3s²3p⁶4s¹3d⁵

^{An element is identified by its atomic number which is equal to the total number of electrons in the neutral atom of that element. Assuming that the configuration describes a neutral atom , the total number of electrons in the atom are (2+2+6+2+6+1+5 = 24) 24 . Thus the atomic number of the element is 24.}

^{The element with the atomic number 24 is Chromium (Cr) .}

^{So, name of element : Chromium}