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: Which of the following atoms has the most unpaired electrons?(a) Co (b) Mn (c) V (d) Fe (e) Cr


Which of the following atoms has the most unpaired electrons?

(a) Co 

(b) Mn 

(c) V 

(d) Fe 

(e) Cr


Determine the # of unpaired electrons by constructing an orbital diagram for each atom

To do so, we need to do the following steps:

Step 1: Determine the shorthand e config. of the neutral element.

Step 2: Draw the orbital diagram for the outermost sublevel and determine the number of unpaired electron

Note that for a neutral element, Atomic Number = # of protons = # of electrons.

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