A century ago, the discovery of hafnium confirmed the validity of the periodic table — but only thanks to scientists who stood up for evidence at a time of global turmoil.

Over 1000 different periodic tables have been proposed since Mendeleev originated the idea 150 years ago. If nature is one, shouldn’t there be ONE periodic table? The 4D Periodic Table of Chemical ...

The periodic table of the elements is also seeing a size increase. On December 30, the International Union of Pure and Applied Chemistry (IUPAC) approved four new elements for inclusion in the table.

Learn about the periodic table of elements. Find lesson plans and classroom activities, view a periodic table gallery, and shop for periodic table gifts.

KS3 Chemistry Periodic table learning resources for adults, children, parents and teachers.

This National Science Foundation-sponsored colloquium engaged prominent scientists in sharing their perspectives on the history of the periodic table, discoveries that have shaped society, current ...

There's a clever design to the Periodic Table. Can you guess why every element has its own special spot? See if you're right with BBC Bitesize.

The development of the periodic table as a result of the contributions two scientists.

My InsiderA periodic table of chemical elements showing where every atom in the solar system comes from. Jennifer A. Johnson/The Ohio State University; NASA; ESA Johnson said the idea for plotting ...

Trends on the Periodic Table: Students learn to describe the pattern in atomic number, atomic mass, atomic radius, ionization energy, and electron affinity as they look across a period and down a ...

150 years ago, Russian chemist Dmitrii Mendeleev created the periodic table of the elements, revolutionizing chemistry.