Heavy element researchers have been keen to lock down the 15 radioactive elements in the periodic table's actinide series ... to work their way through the list of potential actinocenes: by ...

Calcium is found on the left of the periodic table, surrounded by other metals. Calcium has the usual properties of a metal. For example it is a good conductor of heat and electricity. Gethin ...

and all the elements in group 0 are unreactive non-metals. The zigzag, staircase, line in the diagram of the periodic table above separates the metals, on the left, from non-metals, on the right.