What is a radioactive element?

Answer 1

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Some atomic nuclei are not stable. These are radioactive and emit radiation. Even though all elements having more than 83 protons are naturally radioactive ones, it is possible to produce (artificially) unstable isotopes (these are called radionuclides) of virtually every element.

The three types of radiation are alpha, beta and gamma radiation. All of these types of radiation are dangerous to living creatures.

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Answer 2

Olivia Anton

A radioactive element is one that has an unstable nucleus, meaning that in order to become more stable, it will spontaneously decay and release particles and/or electromagnetic radiation. This process is known as radioactivity.

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Answer from HIX Tutor

When evaluating a one-sided limit, you need to be careful when a quantity is approaching zero since its sign is different depending on which way it is approaching zero from. Let us look at some examples.