This part of the periodic table was the playground of Glenn Seaborg, an American physicist. In 1940 Seaborg was part of a group at the University of California, Berkeley, that made neptunium (93).

MORE TO EXPLORE. The Periodic Table, Its Story and Its Significance. Eric Scerri. Oxford University Press, 2007. A Suggested Periodic Table up to Z ≤ 172, Based on Dirac–Fock Calculations on ...

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 .

Give each student a Periodic Table of Energy Levels activity sheet. This table contains energy level models for the first 20 elements. The electrons are included only for the atoms at the beginning ...

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 ...

The periodic table is arranged into columns and blocks that are supposed to mirror how elements’ outermost electrons are arrayed. Elements are grouped into sections called s, p, d and f blocks ...

Physicists develop a 'nuclear periodic table'. While the traditional table is based on the behavior of electrons in an atom, this new table is based on the protons in the nucleus. Protons have ...

The periodic table shows all the atoms that everything in the known universe is made from. It’s kind of like the alphabet in which only 26 letters, in different combinations, make up many thousands of ...

Elements in the periodic table are arranged in order of increasing atomic number. The atomic number represents the number of protons in an atom's nucleus, uniquely identifying each element.

The periodic table of elements—also known as Mendeleev’s table—was developed in 1869 by Russian chemist Dmitri Mendeleev. It organizes all known chemical elements by their atomic number, ...