What do all these things have in common? They all have a link to the periodic table, which turned 150 in 2019! Here are some fascinating elements that you may never have heard of, but definitely ...

He started his talk by discussing the first modern periodic table produced in 1869 by Dmitri ... order of their atomic numbers show a periodic variation in atomic structure and most of their ...

4. The suction forces of land plants, which alone had previously been examined with a view to periodicity, very clearly show periodic variations.The diurnal suction-force curve, with a maximum toward ...