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Chemistry

Chapter 1 - Transition Elements and Iron Metallurgy

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Chapter 5 - Organic Chemistry

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Lesson 5: Hydrocarbon Derivatives – Alcohols and Phenols — Lesson quiz

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1.
What is the exact chemical deduction according to Egyptian curriculum standards for: Electronic Configuration of the First Transition Series?
Both Chromium and Copper have fully filled 4s2 orbitals
Scandium (Sc: 21) exhibits stable oxidation states of +1, +2, and +3
Zinc (Zn: 30) is considered a typical transition element in all its compounds
Chromium (Cr: 24) has an anomalous configuration [Ar] 4s1 3d5 to achieve half-filled d-subshell stability, and Copper (Cu: 29) is [Ar] 4s1 3d10 for completely filled d-subshell stability
2.
What is the exact chemical deduction according to Egyptian curriculum standards for: Standard Hydrogen Electrode (SHE) and Galvanic Cells?
SHE has an arbitrarily defined standard potential E° = 0.00 V under standard conditions (1 atm H₂ gas, 1.0 M H+ solution, 298 K)
The standard hydrogen electrode uses pure copper wire without platinum black
SHE potential changes to 1.00 V when connected to Zinc
SHE can only act as an anode and never as a cathode
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