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Atomic masses of phosphorus across time

Feature

How atomic weights change with scientific understanding

Why do the atomic weights on the periodic table keep changing? Kit Chapman meets the team behind the decimal places

Scientist studying a protein with a camera

Feature

Serial femtosecond crystallography reveals protein dynamics in real time

Proteins are constantly moving, but our structures of them are static. Clare Sansom talks to the researchers using free-electron lasers to make time-resolved structures

A close up image of a fly's eye reveals a pattern of raised hexagons next to a hairy surface.

News

How the extraordinary science of everyday items is bringing chemistry to the public

Three analytical chemists explain how turning powerful techniques towards ordinary objects inspires public engagement with science

Wordle style game

Opinion

Wordle meets the periodic table: Five games to test your chemistry knowledge

Love Wordle and chemistry? Combine the two with these daily chemistry-themed word games

Plastic pollution

News

Plastic treaty negotiations go down to the wire

Capping production and limiting use of harmful chemicals are key topics for negotiators to consider

Group picture

Intergovernmental panel on chemicals, waste and pollution needs diverse input

By

Balancing industrial expertise against unwanted commercial influence is not easy but shouldn’t be discounted

Wordle style game

Wordle meets the periodic table: Five games to test your chemistry knowledge

By

Love Wordle and chemistry? Combine the two with these daily chemistry-themed word games

Fountain pen nib, writing

Letters: August 2025

By

Readers continue celebrating benzene and debating the use of glyphosate

Prenatal group

Learning about chemistry in prenatal class

By

Opportunities for infographics to contribute to health literacy

Losing sleep over pesticide exposure

By

Managing exposure risks poses questions about the extent of producers’ and regulators’ responsibilities for safety

Nora de Leeuw: ‘Some of my best PhD students weren’t that great at passing exams’

By

The computational chemist on perspectives from outside academia and the importance of inquisitiveness

Al-Biruni’s pyknometer

By

Accuracy transmitted through the ages

Queue

Careers

The additional costs of visas

On top of the financial expense, applications and renewals are slowing scientific progress and damaging researcher mental health

A close up image of a fly's eye reveals a pattern of raised hexagons next to a hairy surface.

News

How the extraordinary science of everyday items is bringing chemistry to the public

Three analytical chemists explain how turning powerful techniques towards ordinary objects inspires public engagement with science

Opinion

Wordle meets the periodic table: Five games to test your chemistry knowledge

Love Wordle and chemistry? Combine the two with these daily chemistry-themed word games

Careers

Even in difficult times, leaders should inspire hope

Finding positives is a vital part of leadership

Opinion

Learning about chemistry in prenatal class

Opportunities for infographics to contribute to health literacy

Sponsored

Queue

The additional costs of visas

On top of the financial expense, applications and renewals are slowing scientific progress and damaging researcher mental health

Akira Yoshino

Even in difficult times, leaders should inspire hope

Finding positives is a vital part of leadership

Paul Board

How I became the crossword compiler for Chemistry World

Sponsored by , By and

Paul Board has been setting Chemistry World’s crosswords for over 15 years. To celebrate the centenary of the (fully) cryptic crossword, he explains his crossword setting process and dissects some of his favourite science-based clues  

Conference registration desk

How to organise a conference

Five tips for successful event planning