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Periodic Table of Elements - PubChem
PubChem
Hydrogen | H (Element) - PubChem
Fluorine | F (Element) - PubChem
Arsenic | As (Element) - PubChem
Copper | Cu (Element) - PubChem
Oxygen | O (Element) - PubChem
Carbon | C (Element) - PubChem
Atomic Mass | Periodic Table of Elements - PubChem
Boron | B (Element) - PubChem