Because it releases much more energy in a much shorter time than chemical explosives can.
You get a rather large explosion.
a nuclear explosion
Noboby can survive a nuclear bomb if he is within explosion distance.
No. A lahar carries far less power than a nuclear bomb. However, large explosive eruptions, which can lead to lahars, can be as strong as or stronger than a nuclear explosion.
Big
A neutron bomb is a form of nuclear weapon. It explodes in several steps. In the first step, control circuits fire electronic blasting caps cause conventional explosives to detonate. They are shaped in such as way that the explosion crushes a ball of nuclear material (mainly plutonium) causing that to produce nuclear fission (an atomic explosion). THAT serves as the trigger to a nuclear fusion explosion- (similar to the hydrogen bomb). This releases heat, blast, and neutrons.
I'm not sure but the strongest bomb is the hydrogen bomb
Highly unlikely if not altogether impossible. In a core meltdown, you might see a steam explosion if the core melts and breaches the containment structure and hits say cooling water. But even a runaway chain reaction in a reactor would not cause a nuclear explosion like a bomb.
Gravity if forming the clouds from the atomic bomb.
because the bomb was designed to make it so.
uncontrolled nuclear fission and/or fusion.
Yes, Nuclear weapons create the biggest man-made explosions