The effect of increased nuclear charge and incomplete screening by filled f orbitals that results in a decrease in the size of atomsThe smallest particle of an element that can be involved in chemical combination with another element; an atom consists of protons and neutrons in a tiny, very dense nucleus, surrounded by electrons, which occupy most of its volume. appearing after the f blockThe lanthanides and actinides, elements in which the f atomic orbitals are being filled. in the periodic tableA chart showing the symbols of the elements arranged in order by atomic number and having chemically related elements appearing in columns..
Printer Friendly Version will open a new window that has a clean view of the page you are viewing, plus any sub-pages. Warning: if you attempt to view a print version of the top page of a path, this could result in a very large file.
PDF Version will prompt a download of only the current page you are viewing.