The elements in which the differentiating electron enters the penultimate energy level i.e. (n−2)f, are called f-block elements.Due to such electronic configuration where the last electron ...

Seaborg included 15 elements in his f-block. That doesn’t make a lot of sense from an electronic configuration point of view, since the f orbitals hold only 14 electrons.

In this video excerpt from NOVA's "Hunting the Elements," New York Times technology columnist David Pogue examines how atomic structure determines reactivity. Meet Theo Gray, chemist and author ...

Group Number: For main group elements (s- and p-block elements), ... For example, the electron configuration of oxygen (O) is 1s 2 2s 2 2p 4, indicating it has 6 valence electrons.

Group Number: For main group elements (s- and p-block elements), the group number corresponds to the number of valence electrons. For example, carbon (C) is in Group 14, so it has 4 valence electrons.