How Many Elements Are In The Sixth Period?
How Many Elements Are In The Sixth Period? The sixth period contains 32 elements, tied for the most with period 7, beginning with caesium and ending with radon. Which elements are in the sixth period? The period 6 transition metals are lanthanum (La), hafnium (Hf), tantalum (Ta), tungsten (W), rhenium (Re), osmium (Os), iridium (Ir),