Active material as well as the entire design.
perhaps biological
An atomic bomb is a type of nuclear weapon that releases energy through nuclear fission (splitting of atomic nuclei). Nuclear weapon is a broader term that encompasses atomic bombs, as well as hydrogen bombs which release energy through nuclear fusion (combining atomic nuclei).
The meaning of the word nuclear weapon, is a weapon that has a nuclear warhead on it.
A fire bomb is a conventional incendiary bomb: magnesium, napalm, etc. A nuclear bomb uses fission and/or fusion and is mostly a blast effect weapon.
Difficult to say. It would have to be one of the NBC weapons of mass destruction (Nuclear, Biological, Chemical). Just my personal opinion, I would have to say a Biological weapon. Both Nuclear and Chemical weapons are inherently self limiting, their damage is massive but there is an end to it. Biological weapons can grow and reproduce and spread, eventually killing both original opponents and all noncombatants and neutrals.
Basically, a conventional bomb uses a chemical explosive as the source of its destructive power. A nuclear weapon uses nuclear material to create an explosion. A nuclear explosion is much larger, and also emits ionizing radiation. A chemical weapon does not emit any radiation. A nuclear weapon's yield is measured in Kilotons (thousand tons). In very simplified terms, this means that a nuclear weapon with a 475 kiloton yield produces an explosion comparable to 475,000 tons of TNT (TNT is a chemical explosive). That's A LOT of TNT and it would take up a bit of space. A nuclear weapon with this yield may only be a few feet long and a foot wide, and the actual nuclear material may be the size of a grapefruit.
The most common method was with artillery.It is NOT a biological weapon, it is a chemical weapon.
This nuclear weapon is called an atomic bomb or a nuclear bomb
Nuclear weapon detonations
If by "bomb" you mean a conventional explosive weapon, then the nuclear weapon is more powerful.
A pike is an infantry weapon. A spear is more or less a projectile weapon.
A weapon is usually made by a proffessional and a rock pick isn't.