Ch.8 - Periodic Properties of the ElementsWorksheetSee all chapters
All Chapters
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: A certain oxygen atom has the electron configuration 1s22s22px22py2. How many unpaired electrons are present? Is this an excited state of oxygen? In going from this state to the ground state, would en

Solution: A certain oxygen atom has the electron configuration 1s22s22px22py2. How many unpaired electrons are present? Is this an excited state of oxygen? In going from this state to the ground state, would en

Problem

A certain oxygen atom has the electron configuration 1s22s22px22py2. How many unpaired electrons are present? Is this an excited state of oxygen? In going from this state to the ground state, would energy be released or absorbed?

Solution

When writing electron configuration, we distribute electrons on each orbital:

 1 orbital  max. of 2 e- 

 3 orbitals  max. of 2 e- per orbital (total of 6 e-)


Writing the orbital diagram of the oxygen atom with electron configuration of 1s22s22px22py2:

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