Question

1. what elements caused the explosion at chernobyl in 1986?

Explanation:

The explosion at Chernobyl in 1986 was mainly due to a power - excursion in the reactor core. The key elements involved were uranium - 235 in the fuel rods. During the flawed safety test, the reactor's control system was bypassed, leading to an uncontrolled chain reaction. The heat generated caused steam explosions that breached the reactor vessel.

Answer:

Uranium - 235