IYPT 2019 Elements 062: Samarium: Guitar pickups and rock dating
Element 62 in our International Year of the Periodic Table series is samarium. Samarium is found in guitar pick-ups and can also be used to date rocks and meteorites.
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IYPT 2019 Elements 061: Promethium: Scarcity and atomic batteries
Element 61 in our International Year of the Periodic Table series is promethium. Only trace amounts of promethium form naturally, which limit its applications, though it has previously been trialled in atomic batteries.
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IYPT 2019 Elements 060: Neodymium: Headphones, speakers, and tanning booths
Element 60 in our International Year of the Periodic Table series is neodymium. Neodymium is used in powerful magnets found in a variety of everyday products. It’s also used in lasers for eye surgery.
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IYPT 2019 Elements 059: Praseodymium: Aircraft engines and fibre optics
Element 59 in our International Year of the Periodic Table series is praseodymium. Praseodymium is used in aircraft engine alloys, and it also found in some fibre optic cables.
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IYPT 2019 Elements 058: Cerium: Lighters, ovens and diesel
Element 58 in our International Year of the Periodic Table series is cerium. Cerium is the main metal in lighter flints, and is also found in ovens and diesel fuel.
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The chemistry of henna
The Muslim festival of Eid al-Adha started on Sunday evening and runs through until Thursday. As part of the celebrations, some create impressively intricate art on their hands using henna. Here we take a look at the molecules in henna that allow it to be used as a dye, and how this process works.
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