Question

part a
se
express your answer in condensed form in order of increasing orbital energy as a string without blank space between orbitals. for example, he2s²2p² should be entered as he2s^22p^2.
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Explanation:

Step1: Determine the atomic number of Se

Selenium (Se) has an atomic number of 34.

Step2: Find the noble gas core

The noble gas before Se in the periodic table is Ar (atomic number 18).

Step3: Write the electron configuration after the noble gas core

After [Ar], we fill the 4s, 3d, and 4p orbitals. The 4s orbital fills first (\(4s^{2}\)), then the 3d orbital (\(3d^{10}\)), and finally the 4p orbital (\(4p^{4}\)).

Answer:

[Ar]4s^23d^104p^4