Question

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CHEMISTRY 201 Exercise 2-Examining electron configurations carbon, oxygen, sodium and sulfur Table 1 a) Electron Pre-Tutorial 1 Complete the following Table 1 shown below forthe ground state, spdt, lectron confguratons of sihum 0 b) Core electron c) Valence electron configuration d) Highest energy orbital diagram for the highest energy orbital Exercise 3-Understanding the different terminology (a) What is lonization Energy, IE? (b) What is Electron Affinity. EA?

Answer 1

	Li	C	O	Na	S
Electronic configuration	1s22s1	1s22s22p2	1s22s22p4	1s22s22p63s1	1s22s22p63s23p4
Core electron configuration	1s2	1s2	1s2	1s22s22p6	1s22s22p6
Valence electron configuration	2s1	2s22p2	2s22p4	3s1	3s23p4
Highest energy orbital	2s	2p	2p	3s	3p
Z	3	6	8	11	16
Zeff	3-(2*0.85) = 1.3	6-(3*0.35)-(2*0.85)=3.25	8-(5*0.35)-(2*0.85)=4.55	11-(8*0.85)-(1*2) = 2.2	16-(5*0.35)-(8*0.85)-(1*2)= 5.45

Boundary diagram is as:

Ionization energy: Energy change or required to remove an electron from outermost shell in an isolated gaseous state

Electron Affinity : Energy change when an electron is added to an atom to form an anion in an isolated gaseous phase