2026 Ralph G. Pearson: Chemistry Researcher – H-Index, Publications & Awards

Discipline name	D-Index	World Ranking	National Ranking	Publications	Citations
Chemistry	68	6389	1934	250	63162

Discipline name

D-Index

World Ranking

National Ranking

Publications

Citations

Chemistry

6389

1934

250

63162

Ralph G. Pearson publication distribution in Chemistry in 2026

The chart shows the distribution of publications by all Research.com ranked scientists in the field of Chemistry in 2026. The highlighted bar marks where Ralph G. Pearson sits on this spectrum.

61 publications 1,295+

This scientist: 250 publications — 49th percentile

49% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 1,295 publications or more.

Ralph G. Pearson D-index placement in Chemistry in 2026

The chart shows the D-index (discipline H-index) distribution of Chemistry scientists ranked by Research.com in 2026. The highlighted bar marks where Ralph G. Pearson sits on this spectrum.

40 D-Index 159+

This scientist: 68 D-Index — 64th percentile

64% of scientists in this discipline score the same or lower.

The last bar groups every scientist with 159 D-Index or more.

Research.com Recognitions

1974 - Member of the National Academy of Sciences
1951 - Fellow of John Simon Guggenheim Memorial Foundation

Overview

Ralph G. Pearson is affiliated with the University of California, Santa Barbara in the United States. Their research primarily focuses on the field of Environmental Science, with a particular emphasis on Ecology and Nature and Landscape Conservation. Other areas of specialization include Water Science and Technology, Environmental Chemistry, and Global and Planetary Change.

The scientist's work covers several main topics, notably:

Fish Ecology and Management Studies
Freshwater macroinvertebrate diversity and ecology
Ecology and Vegetation Dynamics Studies
Soil and Water Nutrient Dynamics
Aquatic Invertebrate Ecology and Behavior
Water Quality and Pollution Assessment
Hydrology and Watershed Management Studies

Ralph G. Pearson has contributed to multiple papers, including:

"Impacts of detritivore diversity loss on instream decomposition are greatest in the tropics," 2021, Nature Communications
"Latitude dictates plant diversity effects on instream decomposition," 2021, Science Advances
"Fresh waters and estuaries of the Great Barrier Reef catchment: Effects and management of anthropogenic disturbance on biodiversity, ecology and connectivity," 2021, Marine Pollution Bulletin
"Drivers of zooplankton dynamics in a small tropical lowland river," 2020, Marine and Freshwater Research
"Water-quality and ecosystem impacts of recreation in streams: Monitoring and management," 2021, Environmental Challenges

The scientist has published work in the following venues most frequently:

Marine and Freshwater Research
Global Change Biology
Nature Communications
Science Advances
Marine Pollution Bulletin

Frequent co-authors include:

Aaron M. Davis
Luz Boyero
Naiara López-Rojo
Alan M. Tonin
Javier Pérez

During their career, Ralph G. Pearson received the following honors:

Member of the National Academy of Sciences, 1974
Fellow of John Simon Guggenheim Memorial Foundation, 1951

Best Publications

HARD AND SOFT ACIDS AND BASES

Ralph G. Pearson

14723
Citations
Absolute hardness: companion parameter to absolute electronegativity

Robert G. Parr;Ralph G. Pearson

10681
Citations
Absolute Electronegativity and Hardness: Application to Inorganic Chemistry

Ralph G. Pearson

4605
Citations
Kinetics and Mechanism

John W. Moore;Ralph G. Pearson;Arthur Atwater Frost

3314
Citations
Hard and soft acids and bases, HSAB, part 1: Fundamental principles

Ralph G. Pearson

3143
Citations
Absolute electronegativity and hardness correlated with molecular orbital theory

Ralph G. Pearson

2062
Citations
Recent advances in the concept of hard and soft acids and bases

Ralph G. Pearson

1869
Citations
Hard and soft acids and bases, HSAB, part II: Underlying theories

Ralph G. Pearson

1350
Citations
Acids and Bases: Hard acids prefer to associate with hard bases, and soft acids prefer to associate with soft bases.

Ralph G. Pearson

1283
Citations
Application of the Principle of Hard and Soft Acids and Bases to Organic Chemistry

Ralph G. Pearson;Jon. Songstad

1277
Citations
Hard and soft acids and bases ― the evolution of a chemical concept

Ralph G. Pearson

1164
Citations
THE PRINCIPLE OF MAXIMUM HARDNESS

Ralph G. Pearson

1118
Citations
Chemical hardness and density functional theory

Ralph G. Pearson

1067
Citations
The Factors Determining Nucleophilic Reactivities

John O. Edwards;Ralph G. Pearson

943
Citations
Absolute Electronegativity and Absolute Hardness of Lewis Acids and Bases

R. G. Pearson

872
Citations
Nucleophilic reactivity constants toward methyl iodide and trans-dichlorodi(pyridine)platinum(II)

Ralph G. Pearson;Harold R. Sobel;Jon Songstad

617
Citations
Ionization potentials and electron affinities in aqueous solution

Ralph G. Pearson

604
Citations
Symmetry rule for predicting molecular structures

Ralph G. Pearson

586
Citations
Rates of Ionization of Pseudo Acids.1 IV. Relation between Rates and Equilibria

Ralph G. Pearson;Robert L. Dillon

519
Citations
The HSAB Principle — more quantitative aspects

Ralph G. Pearson

462
Citations

Frequent Co-Authors

Fred Basolo Northwestern University

Stewart F. Parker Rutherford Appleton Laboratory

Peter C. Ford University of California, Santa Barbara

Charles H. F. Peden Pacific Northwest National Laboratory

Harry B. Gray California Institute of Technology

Robert G. Parr University of North Carolina at Chapel Hill

Oren P. Anderson Colorado State University

Marca M. Doeff Lawrence Berkeley National Laboratory

Gary L. Haller Yale University

Michael J. Hynes University of Galway

External Links

Personal website of Ralph G. Pearson

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