The less LD50 is, the more poisonous it is, so we must beware of this type of snake. The following editor will tell you which deadly poisonous snakes are.
The following snakes have an LD50 of less than 0.1mg/kg
Enhydrina schistosa (hook-nose sea snake/split-chin sea snake)
Pelamis platurus (yellow-bellied sea snake/black-backed sea snake)
Aipysurus duboisii (Du's sword-tailed sea snake)
Oxyuranus microlepidotus (inland Taipan snake)
Dendroaspis polylepis (black snake) Mamba)
Dispholidus typus (African tree snake)
Crotalus tigris (Tabbit rattlesnake)
Bungarus caeruleus (Indian krait/Indian Umbrella Festival)
Daboia russelii (mountain viper/chain snake)

Some snakes have a large LD50, but a large amount of venom
Bitis gabonica(Gabonese Pit Viper)
Ophiophagus hannah(King Cobra)
Crotalus adamanteus(Eastern Diamondback Rattlesnake)
Crotalus atrox( Western Diamondback Rattlesnake)
Lachesis muta (giant pit viper)
Make a comparison
Red-tailed green bamboo silk (not dangerous) Viper)
LD50 (subcutaneous) 4mg/kg, the poisoning amount is 0.6-30mg
Gabonese scorpion
LD50:0.14mg/kg, the poisoning amount is 350mg