Interpretation:
The ground state electronic configuration of selenium is to be obtained by using the Aufbau principle.
Concept introduction:
Aufbau Principle states that every electron occupies the orbitals in the increasing order of their energy.
The four steps for writing the ground state electronic configuration of an element are shown below:
An electron will enter the lowest energy orbital.
A maximum of two electrons can occupy each orbital.
In a degenerate orbital, the electrons do not pair until all the orbitals are occupied with at least one electron.
Electrons occupy the orbitals in the following order:
Noble gas core is used to represent electron configuration of all the elements except hydrogen and helium.
Noble gas core is an abbreviation in an atom’s electron configuration. It replaces the electron configuration of noble gas element most recently precede the element.

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Chapter 6 Solutions
BURDGE CHEMISTRY VALUE ED (LL)
- A mixture of C7H12O2, C9H9OCl, biphenyl and acetone was put together in a gas chromatography tube. Please decide from the GC resutls which correspond to the peak for C7,C9 and biphenyl and explain the reasoning based on GC results. Eliminate unnecessary peaks from Gas Chromatography results.arrow_forwardIs the molecule chiral, meso, or achiral? CI .CH3 H₂C CIarrow_forwardPLEASE HELP ! URGENT!arrow_forward
- Identify priority of the substituents: CH3arrow_forwardHow many chiral carbons are in the molecule? OH F CI Brarrow_forwardA mixture of three compounds Phen-A, Acet-B and Rin-C was analyzed using TLC with 1:9 ethanol: hexane as the mobile phase. The TLC plate showed three spots of R, 0.1 and 0.2 and 0.3. Which of the three compounds (Phen-A; Acet-B or Rin-C) would have the highest (Blank 1), middle (Blank 2) and lowest (Blank 3) spot respectively? 0 CH: 0 CH, 0 H.C OH H.CN OH Acet-B Rin-C phen-A A A <arrow_forward
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