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Mini-Quiz: Atomic Weight

by Ron Kurtus (revised 24 July 2007)

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



1. Why did they set the atomic weight of a proton as 1 instead of its exact weight?

The exact weight was too small to be convenient

Its exact weight actually is 1 kg

Because the weight of an electron is also 1

2. What is an isotope?

An atom that only has neutrons in its nucleus

An atom that has lost or gained electrons

An atom with different number of neutrons for that element

3. What happens to the extra mass in nuclear fission?

It turns into mass, according to E = mc²

It turns into energy, according to E = mc²

Nothing, because the of Conservation of Mass

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


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