By the periodic table’s logic, all d-block elements should have filled s orbitals. But copper defies that logic. It should have the electron configuration [Ar] 3d 9 4s 2 .

Discover the history, structure, and importance of the periodic table of elements, from Mendeleev’s discovery to modern scientific applications. When you purchase through links on our site, we ...

I cannot remember when I first saw a periodic table. I guess it was on my classroom wall at school when I was 14, a typical age for British schoolchildren to start studying chemistry in those days.

Last week, we explored the evolution of the periodic table, with all its elements in order. Now that we’re well-organized, let’s dive into the reasoning.

The periodic table is an icon of science that sits at the heart of chemistry," he says. "Everything in the physical world is constructed from periodic table stuff. In other words, the 92 stable ...

Elementary school teachers can use these activities to enrich the study of many different science topics in the elementary curriculum. Topics are aligned with curriculum for physical science, earth ...

Even in the bright light of modern science, chemical reactions remain profoundly captivating, Dr. Scerri said: “In a physical mixture, you get the sum of the parts when you mix A with B.

GCSE Chemistry (Single Science) Atomic structure and the periodic table learning resources for adults, children, parents and teachers.