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There isn't one, as anything in large enough quantity can be fatal.

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11y ago

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Why and how can two very poisonous elements when joined together create a completely harmless substance?

Suppose an animal ate poisonous element A and then poisonous element B. Both elements would join together in the animal's tummy. As a consequence, the animal would be DEAD and I guess we could say transformed into a completely harmless substance. I hope you are satisfied with my answer. I really went out of my ways to please you. Thank you for posting at WikiAnswers!


When an element undergoes nuclear transmutation the result is a completely different what?

When an element undergoes nuclear transmutation the result is a completely different element or isotope. All transmutation occurs through decay or nuclear reaction.


What happens when you combine the intake of two or more drugs at the same time?

It depends completely on what the two drugs are. Some drugs are toxic/lethal together and others are harmless. Need more info from you.


What do you need to do to the proton in order to change the element?

Protons basically determine what type of element you end up with. All you really have to do is add or subtract protons and you will end up with a completely different element. Also removing or adding specific numbers of neutrons can result in radioactive isotopes of that element.


How many half-lives does it take for an element to be considered harmless?

An element is typically considered to be at a safe level after about 10 half-lives, as this is when the remaining quantity of the radioactive substance is reduced to less than 0.1% of the original amount. At this point, the radioactivity and associated risk are generally considered negligible. However, specific safety standards can vary depending on the element and context.