Complex sentence: All the s-block metals are dangerous fire hazards which require special extinguishants to extinguish, except for beryllium and magnesium, storage must be under either argon or an inert liquid hydrocarbon.
Split into simpler sentences: All the s-block metals are dangerous fire hazards which require special extinguishants to extinguish. Except for beryllium and magnesium, storage must be under either argon or an inert liquid hydrocarbon.