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Explain how an element can have different isotopes.

If there are:


• the same amount of protons


• different amount of neutrons

Define half-life.

The amount of time it takes for half of an isotopes radioactive nuclei to decay.

What is a positron?

• An electron that is positively charged


• beta plus particle

What is beta minus?

A fast moving electron ejected from the nucleus.


Radiation.

What is beta plus?

A fast moving positron ejected from the nucleus.

What is gamma?

Electromagnetic radiation emitted from the nucleus.

What is alpha radiation?

Consists of 2 protons and 2 neutrons