Your question is too vague to give a definitive answer. A small species (such as a Coral snake) may only weigh a few ounces (grammes), while a fully-grown Puff Adder could weigh as much as 13 lbs (6.0 kg)
Most poisonous snake have fang.
No, the black rat snake is not poisonous.
the most poisonous is the beaked sea snake
rattle snake
a venomous snake
cottonmouth snake
Water Moccasins are a poisonous snake. A very aggressive snake as well.
If the snake was poisonous no but if it's not poisonous then it's fine
Extremely poisonous
You can determine if a snake is underweight by looking for visible signs such as prominent bones, loose skin, and a lack of muscle mass. Additionally, you can weigh the snake regularly and compare its weight to the average weight for its species and size. If the snake is consistently below the average weight range, it may be underweight.
Belcher's sea snake.
Average is around 300 pounds