Elements in group 1 and group 2 are metals. Atoms of group 1 elements have one electron in their outer shell, and atoms of group 2 elements have two electrons ... in the periodic table for more ...

Location = number of valence electrons, metal v. non-metal, tells us something about atomci radius, electronegtivity, ionisation energy depending on group and period trends. Take an element such as ...

The “lead” of a pencil is actually made of a substance called graphite which is made of carbon atoms. The picture shows a close-up of one carbon atom. A hydrogen atom has one proton as the nucleus and ...

The elements that lie between group ... orbital electrons that are ionised first before the 3d orbitals. We have to conclude that, ironically for the d-block elements, the 4s orbitals are in fact ...