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  • The s, p, d, f and g blocks correspond to parts of the Periodic Table that have s, p, d, f and g orbitals.
  • s, p, d, and f also correspond to specific shapes of orbitals which can be searched on Google Images.
  • p-block elements are the elements in Groups IIIA - VIIIA
  • s-block elements are the elements in Groups IA and IIA (The s and p-blocks are known as the representative elements.)
  • d-block elements are the elements in Groups IB - VIIIB (Also known as "transition metals")
  • f-block elements are comprised of the actinoids and lanthanoids. (Also known as "inner-transition metals")
  • Note: the element created by Tony Stark in Iron Man 2 is not even close to possible for humans at this point. The closest that scientists have come to building an element with an atomic number higher than 200 is 118. This also ignores the fact that an element with such a large atom size would be highly radioactive.
  • NOTE: if you are not a theoretical physicist or working on publishing a paper on theoretical orbitals, then the rest of this answer is irrelevant.
  • While s, p, d, and f block elements and orbitals have been proved true by scientists' observations, further orbitals are also predicted by Schrodinger's Equations.
  • the g and h orbitals are 2 of the theoretical orbitals that have yet to be proven existent.
  • While scientists believe it is probable that they exist, it has also been speculated by scientists that any atom with this many orbitals will become incredibly large and decay via alpha radiation.
  • Since the largest atom created so far already has a half-life measured in fractions of a millisecond, larger atoms are expected to decay within even smaller fractions of time.
  • Scientists have also predicted "islands of stability" in g and h block groups; however, none have been proven due to the obvious lack of physical observations and proof.
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