The periodic table’s arrangement also allows scientists to discern trends in element properties, including electronegativity, ionization energy, and atomic radius. Many scientists worked on the ...

He wrote the properties of the elements on pieces of card and rearranged them until he realised that, by putting them in order of increasing atomic weight ... is called the Transition Metals.

In the periodic table, the transition elements and group 1 elements are metals. Some of the properties of two transition elements and two group 1 elements are shown in table 1. Use your own ...