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Mini-Quiz: Isotopes

by Ron Kurtus (24 July 2007)

Take this Mini-Quiz to check your understanding of the lesson material.

1. Is it possible for an element to have isotopes with different numbers of protons?

Yes, that is the definition of an isotope

It depends on the number of electrons the element has

No, because the element is defined by a specific number of protons

2. Why is one isotope of an element so much more common that the others?

The less common isotopes are usually unstable

The heavier the isotope, the more common it is

All isotopes are common

3. What does the half-life of an isotope mean?

It means that 1/2 of the atoms are isotopes

It is the time it takes for 1/2 of the isotope atoms to decay into another material

It is 1/2 of the age of the isotope

If you got all three correct, you are on your way to becoming a Champion in Chemistry. If you had problems, you had better look over the material again.

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