Ch.8 - Periodic Properties of the ElementsWorksheetSee all chapters
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Ch.1 - Intro to General Chemistry
Ch.2 - Atoms & Elements
Ch.3 - Chemical Reactions
BONUS: Lab Techniques and Procedures
BONUS: Mathematical Operations and Functions
Ch.4 - Chemical Quantities & Aqueous Reactions
Ch.5 - Gases
Ch.6 - Thermochemistry
Ch.7 - Quantum Mechanics
Ch.8 - Periodic Properties of the Elements
Ch.9 - Bonding & Molecular Structure
Ch.10 - Molecular Shapes & Valence Bond Theory
Ch.11 - Liquids, Solids & Intermolecular Forces
Ch.12 - Solutions
Ch.13 - Chemical Kinetics
Ch.14 - Chemical Equilibrium
Ch.15 - Acid and Base Equilibrium
Ch.16 - Aqueous Equilibrium
Ch. 17 - Chemical Thermodynamics
Ch.18 - Electrochemistry
Ch.19 - Nuclear Chemistry
Ch.20 - Organic Chemistry
Ch.22 - Chemistry of the Nonmetals
Ch.23 - Transition Metals and Coordination Compounds

Solution: In the ground state of element 115, Uup, how many electrons have ms = -1/2 as one of their quantum numbers?

Solution: In the ground state of element 115, Uup, how many electrons have ms = -1/2 as one of their quantum numbers?

Problem

In the ground state of element 115, Uup, how many electrons have ms = -1/2 as one of their quantum numbers?

Solution

Recall: The magnetic spin quantum number ms can have a value of +1/2 or –1/2. If there are two anti-parallel electrons in an orbital, one of those two electrons has ms = – 1/2.

The atomic number of Uup is 115, so the neutral atom has 115 electrons. The electron configuration of Uup is: [Rn] 5f146d107s27p35f146d107p3

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