[{"n": "Palladium", "u": "/e/chemical-elements-and-metals/palladium/", "s": "Rare platinum-group metal used in catalytic converters and jewelry."}, {"n": "Phosphorus", "u": "/e/chemical-elements-and-metals/phosphorus/", "s": "The element that glows, burns, and sustains life."}, {"n": "Platinum", "u": "/e/chemical-elements-and-metals/platinum/", "s": "The most ductile pure metal, a noble and precious element with critical industrial and medical uses."}, {"n": "Plutonium", "u": "/e/chemical-elements-and-metals/plutonium/", "s": "Plutonium is the element with the highest atomic number known to occur in nature."}, {"n": "Polonium", "u": "/e/chemical-elements-and-metals/polonium/", "s": "Highly radioactive element discovered by the Curies."}, {"n": "Potassium", "u": "/e/chemical-elements-and-metals/potassium/", "s": "Soft alkali metal essential to life and widely used in fertilizers."}, {"n": "Praseodymium", "u": "/e/chemical-elements-and-metals/praseodymium/", "s": "The leek-green twin among rare-earth metals."}, {"n": "Promethium", "u": "/e/chemical-elements-and-metals/promethium/", "s": "A rare, radioactive lanthanide with no stable isotopes."}, {"n": "Protactinium", "u": "/e/chemical-elements-and-metals/protactinium/", "s": "Rare radioactive element used in ocean science and nuclear research."}, {"n": "Radium", "u": "/e/chemical-elements-and-metals/radium/", "s": "Radioactive alkaline earth metal discovered by the Curies."}, {"n": "Radon", "u": "/e/chemical-elements-and-metals/radon/", "s": "Radioactive noble gas, colorless and odorless, second leading cause of lung cancer."}, {"n": "Rhenium", "u": "/e/chemical-elements-and-metals/rhenium/", "s": "Rhenium is a rare, high-melting transition metal used in superalloys and catalysts."}, {"n": "Rhodium", "u": "/e/chemical-elements-and-metals/rhodium/", "s": "Rare noble metal used in catalytic converters and jewelry plating."}, {"n": "Rubidium", "u": "/e/chemical-elements-and-metals/rubidium/", "s": "The deep red alkali metal discovered by flame spectroscopy."}, {"n": "Ruthenium", "u": "/e/chemical-elements-and-metals/ruthenium/", "s": "Ruthenium is the chemical element with the symbol Ru and atomic number 44."}, {"n": "Samarium", "u": "/e/chemical-elements-and-metals/samarium/", "s": "A lanthanide metal used in magnets, medicine, and nuclear reactors."}, {"n": "Scandium", "u": "/e/chemical-elements-and-metals/scandium/", "s": "Scandium: a silvery-white d-block element, usually classified as a rare-earth, used primarily in aluminium all"}, {"n": "Selenium", "u": "/e/chemical-elements-and-metals/selenium/", "s": "Essential trace element and semiconductor discovered in 1817."}, {"n": "Silicon", "u": "/e/chemical-elements-and-metals/silicon/", "s": "The semiconductor element that shapes the modern world."}, {"n": "Sodium", "u": "/e/chemical-elements-and-metals/sodium/", "s": "Soft, reactive alkali metal essential for life."}]