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1 All About Elements: Oxygen http://wardsci.com https://wardsci.com/store wardsci.com | 800-962-2660 2 3 Fun Facts About… Oxygen 1. Oxygen constitutes 21% of our atmosphere nearly half the mass of the earth’s crust and about two thirds of the huma...

1 All About Elements: Helium https://wardsci.com/store wardsci.com | 800-962-2660 2 3 Fun Facts About…Helium 1. Helium is the second most abundant ele- ment after hydrogen in the universe and solar system. Approximately 11.3% of all atoms in the u...

1 All About Elements: Fluorine http://wardsci.com https://wardsci.com/store wardsci.com | 800-962-2660 2 Ward’s All About Elements Series Building Real-World Connections to the Building Blocks of Chemistry The periodic table of elements is an esse...

1 All About Elements: Helium https://wardsci.com/store wardsci.com | 800-962-2660 2 3 Fun Facts About…Helium 1. Helium is the second most abundant ele- ment after hydrogen in the universe and solar system. Approximately 11.3% of all atoms in the u...

VWR.COM - Terms and Conditions Dernière mise à jour : octobre 2018 Conditions générales de vente de VWR 1) Définitions. a) « contrat » s’entend des présentes conditions générales de vente. b) « renseignements confidentiels » s’entend de tous les r...