1s2 2s2 2p6 3s2 3p3 - phosphorous has vacant 3d orbitals that can be used in bonding - 'expanded valence shell ... in terms of lower electronegativity so positive oxidation states more likely.

We find that it is the 4s 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 higher in energy ...

In simplistic terms, chemical elements bond by sharing or giving each other electrons, so their electron orbitals are in the most stable configurations. Some elements are desperate to do that and ...

The periodic table of elements (often known simply as the periodic table) has been helping scientists with their work for a little over 150 years. The handy visual reference guide organizes known ...

JEE Main session 1 is planned to be conducted on 22, 23, 24, 28, 29, and 30 January. The National Testing Agency (NTA) has already released the 2025 JEE Main Admit Card for the initial three days.

Department of Chemistry and Biochemistry, University of California, San Diego, La Jolla, California 92093, United States ...

Concept of atomic orbitals as one-electron wave functions ... Modern periodic law and present form of the periodic table, s, p. d and f block elements, periodic trends in properties of elements ...

National Cancer Institute researchers have developed a method called HORNET for characterizing 3D topological structures of large and flexible RNA molecules. Scientists used atomic force ...

Center for Space Research, North-West University, Private Bag X6001, Potchefstroom 2531, South Africa ...

The 6 Times Table with Fred the Red. videoThe 6 Times Table with Fred the Red Manchester United's mascot, Fred the Red has a song and movement routine to help students learn the 6 times table.