No two electrons in an atom can have all four quantum numbers identical. The symbol of silicon is Si and belongs to the 14 th group of periodic table and it is above Carbon. It is a semiconductor and tetravalent metalloid. This is a brittle and hard Crystalline solid which has the metallic lustre of blue and grey. The remaining three electrons will go in the 2p orbital. Silicon Electron Configuration: Silicon is the chemical element with atomic number 14. Since 1s can only hold two electrons the next 2 electrons for N goes in the 2s orbital. In writing the electron configuration for nitrogen the first two electrons will go in the 1s orbital. Each singly filled orbital should have the same spin. Nitrogen is the seventh element with a total of 7 electrons. They areĮvery orbital in a subshell should be singly filled before any of the orbitals are doubly filled. Note: Not only Aufbau’s principles are followed to fill the electrons in the orbitals, but also other principles have been to arrange the electrons. The principle was not named after a scientist, but the name came from German, Aufbauprinzip, which means building-up principle. Answer : Carbon is the 6th element in the periodic table, hence the atomic number Z 6, and therefore has 6 electrons. The Aufbau’s principle was formulated by two scientists namely Wolfgang Pauli and Niels Bohr in the early 1920’s. Silicon (Z=14) = \Īdditional Information. Therefore, The electronic configuration ofĭ. So, these noble gases can be prefixed in the outermost shell of the element whose electronic configuration is being calculated. These noble gases have stable configuration i.e. We can also write the electronic configuration of an element by using the noble gases. These electrons are filled in the subshells according to the Aufbau’s principle. 2 valence electrons of the central O-atom consumed in covalent bonding out. We can write the electronic configuration of an atom by assigning the number of electrons that are present in the atom as the superscript of the subshell. In the Lewis structure, the central oxygen atom is bonded to two carbon atoms. only 2 electrons can be occupied in s subshell, 6 electrons in p subshell, 10 electrons in d subshell and 14 electrons in f subshell. Each subshell can accommodate only a certain number of electrons, i.e. There are totally four subshells present which are labelled as s, p, d and f. The electrons are arranged in the subshell according to Aufbau's principle.Įach electron present in an atom is present in a subshell. Hint: In order to write condensed orbital notation of electronic configuration of the given elements, we must know how the electrons are filled in the atomic orbitals and how the subshells are arranged.
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