Het periodiek systeem

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How A Tv Works In Slow Motion - The Slow Mo Guys HB.mp4

MegaLab - Flame Test - Li, Na, K, Ca, Sr, Ba, Cu.mp4

Rutherford's Experiment Nuclear Atom.mp4

Natrium en water - bewerkt.mp4

1947 DISPOSAL OF 20,000 POUNDS OF SODIUM IN WATER.mp4

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