Cobalt bomb is not much destructive, actually it's not a 'bomb' exactly. It's merely a device used as a source of gamma rays and is used in medicine and other applications.
The only dangers that could be associated with it is a possibility of contamination when some serious mishandling and failure happens.
Russia
In 1732, Georg Brandt, a Swedish chemist, discovered cobalt. He was attempting to prove that the ability of certain minerals to color glass blue was due to an unknown element, and not to bismuth, as was commonly believed at the time.
Cobalt (I) chloride = Cobalt monochloride = CoCl Cobalt (II) chloride = Cobalt dichloride = CoCl2 Cobalt (III) chloride = Cobalt trichloride = CoCl3
Cobalt is generally bivalent or trivalent. So either Cobalt (II) or Cobalt (III).
Cobalt Chloride, Cobalt Nitrate
Russia
the hydrogen bomb, is a nuclear bomb
(Rhymes with "Bunt") Actually I think the C bomb refers to the Radioactive Cobalt 60 bomb.
The cobalt bomb is a modified hydrogen bomb containing a jacket of cobalt. Natural cobalt is isotopically pure stable cobalt-59 and when it captures a high energy fusion neutron it transmutes to the highly radioactive isotope cobalt-60. This dramatically increases the fallout produced. The cobalt bomb was proposed for use as an area denial weapon, as the cobalt-60 fallout contaminated area would be completely uninhabitable for roughly 25 years. But it never made it to development as an actual weapon by any country. You simply cannot control where the fallout will go or its distribution, making it as dangerous to the army using it as to the army it is used on.
Enormous destructive power.
Sea Hunt - 1958 Cobalt Bomb 3-6 was released on: USA: 13 February 1960
The nuclear bomb
That is complicated as it would depend on yield and height/depth of burst for each bomb, not type of bomb (fission or fusion).
well it was close but london treated its first patient but
yes its about 70 - 400 times more powerful..
It is the most destructive weapon ever created.
There is no such thing as a cobalt bomb, such as described in various comic books in the past. The only known (non-classified) thermonuclear bombs are the A-Bomb and the H-Bomb. The H-Bomb is much more powerful and expensive, but several countries already have it. Actually I'll answer this myself... The Gold-Bomb. Replacing about 1 ton of Uranium tamper on the secondary with 1 ton of gold would produce a very practical "salted" high contamination bomb. but the gold is probably too expensive for anyone to try it. The cobalt bomb is impractical because cobalt's capture crosssection is too small for high energy fusion neutrons. See Chuck Hansen's "Swords of Armageddon" Volume V for details.