'Fractional abundance' diaporamas de présentation

Chapter 1 What is Biodiversity?

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How did different scientists contribute to atomic theory?

How did different scientists contribute to atomic theory?. Democritus. He asked this question: If you break a piece of matter in half, and then break it in half again, how many breaks will you have to make before you can break it no further?

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Atomic Mass (Weights)

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ISOTOPES

ISOTOPES. Atoms of the same element that contain different numbers of neutrons and have different atomic masses. If mass is not given, always add protons and neutrons. Examples: Carbon-13 13 6 C Oxygen-18 18 8 O. Average Atomic Mass.

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