If by "H" you mean Hydrogen, the hydrogen bomb hadn't been invented yet. The two bombs dropped on Japan were both atom bombs, albeit of different designs (one uranium, one plutonium).
37 posted on 04/19/2015 2:24:45 PM PDT by Lurking Libertarian
(Non sub homine, sed sub Deo et lege)
40 posted on 04/19/2015 4:47:53 PM PDT by PapaNew
(The grace of God & freedom always win the debate in the forum of ideas over unjust law & government)