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Science…is part and parcel of our knowledge and obscures our insight only when it holds that the understanding given by it is the only kind there is.

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One thing I have learned in a long life: that all our science, measured against reality, is primitive and childlike - and yet it is the most precious thing we have.

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An expert is a person who has made all the mistakes that can be made in a very narrow field.

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Quick video on how to write an electron configuration for a specific element using Noble Gas notation.

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Periodic Table History & Periodic Table Families

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This is a video that explains how Mendeleev put the periodic table together. A short original activity is used to describe his organization.

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Half Life Calculations Part 3 (easy way)

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Another simple example of a half life calculation, but instead finding the final percentage of the remaining sample.