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 reaction below represents the electron affinity of Be?a. Be(g) → Be+(g) + e-b. Be(g) + e→ Be-(g) c. Be+(g) → Be(g) + e-d. Be(g) + e→ Be+(g)e. Be+(g) + e→ Be(g)

Problem

Which reaction below represents the electron affinity of Be?

a. Be(g) → Be+(g) + e-

b. Be(g) + e→ Be-(g) 

c. Be+(g) → Be(g) + e-

d. Be(g) + e→ Be+(g)

e. Be+(g) + e→ Be(g)

Solution

We’re being asked to determine the equation representing the electron affinity of Be


Recall that electron affinity is the energy change from the addition of 1 e to a gaseous element/ion


It is represented by this chemical equation:

Atom(g) + e  Ion(g), ΔE = –E.A. 


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