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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.


Why do two isotopes of an element have the same atomic number but differnent mass number?

Because the atomic number is the number of protons in an element. If you change the atomic number you will have a completely different element. The mass number changes because the number of neutrons is different.