Question

What is the electronic configuration for Astatine using noble gas shorthand notation?

Answer 1

Electronic configuration tells us about the distribution of electrons of an atom or molecule in atomic or molecular orbitals. Electronic configuration was first discovered through the Bohr model of the atom which generally describes shells and subshells.

Complete answer:
The electron distribution in electronic configuration firstly states the maximum number of electrons in their shells like s subshell acquire at most 2 electrons, p subshell have 6, d have 10 electrons, f subshell have 14 electrons and g subshell acquire 18 electrons in its orbit. The distribution of electrons is based on the three principles called Aufbau principle, Pauli Exclusion Principle and Hund’s rule.
Astatine is the chemical element represented by $As$ which is found in the fifteenth column of periodic table and atomic number of astatine is 33. So its electronic configuration is based on above mentioned three rules:$[Ar]4{{s}^{2}}3{{d}^{10}}4{{p}^{3}}$. Now to write astatine using noble gas shorthand notation we first come to know that which noble gas element is written here so noble gas having atomic number 18 will be right here which is Argon and having electronic configuration $1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}3{{p}^{6}}$this is represented by the symbol $Ar$.
Hence the electronic configuration for Astatine using noble gas shorthand notation $[Ar]4{{s}^{2}}3{{d}^{10}}4{{p}^{3}}$.

Note:
Noble gases are gases whose valence shell is completely filled where the valence shell corresponds to the shell in which the last electron of an atom fills. There are six naturally occurring noble gases which are helium, neon, argon, krypton, xenon and radon.