was he a chairman of any commission ?
Yes, Seaborg was chairman of the Atomic Energy Commission
Glenn T. Seaborg
After appointment by President John F. Kennedy and confirmation by the United States Senate, Seaborg was chairman of the Atomic Energy Commission (AEC) from 1961 to 1971. 
where are the most massive elements on the periodic table UNANSWERABLE what is the island of stability ? In nuclear physics, the island of stability is a predicted set of isotopes of superheavy elements that may have considerably longer half-lives than known isotopes of these elements. who discovered it ? UNANSWERABLE what are super heavy elements you mentioned above ? Superheavy elements, also known as transactinide elements, transactinides, or super-heavy elements, are the chemical elements with atomic numbers greater than 103. who discovered them ? Glenn T. Seaborg first proposed the actinide concept, which led to the acceptance of the actinide series. what are their characteristics ? Due to their short half-lives (for example, the most stable known isotope of seaborgium has a half-life of 14 minutes, and half-lives decrease gradually going to the right of the group) and the low yield of the nuclear reactions that produce them what are their early predictions ? In 1914, German physicist Richard Swinne proposed that elements heavier than uranium, such as those around "Z" = 108, could be found in cosmic rays who is the above scientist ? UNANSWERABLE any awards won by him  ? Nobel Prize in Chemistry
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Glenn T. Seaborg [SEP] Chairman of the Atomic Energy Commission
After appointment by President John F. Kennedy and confirmation by the United States Senate, Seaborg was chairman of the Atomic Energy Commission (AEC) from 1961 to 1971. His pending appointment by President-elect Kennedy was nearly derailed in late 1960 when members of the Kennedy transition team learned that Seaborg had been listed in a "U.S. News & World Report" article as a member of "Nixon's Idea Men". Seaborg said that as a lifetime Democrat he was baffled when the article appeared associating him with outgoing Vice President Richard Nixon, a Republican whom Seaborg considered a casual acquaintance. During the early 1960s, Seaborg became concerned with the ecological and biological effects of nuclear weapons, especially those that would impact human life significantly.