Welcome to the 2019 edition of the Compound Interest #ChemistryAdvent calendar! As it’s the International Year of the Periodic Table, this year we’re running with a periodic table theme – every day in the run-up to Christmas, there’ll be a different periodic table featured.
New links will appear below the graphic each day (note that I’ve decided to dispense with the clickable image this year, as it’s time-consuming to set up and only works on some devices anyway).

Day 1: A periodic table of element discoveries
Day 2: A periodic table of element Scrabble scores
Day 3: A periodic table of rejected element names
Day 4: A periodic table of Google search hits
Day 5: A periodic table of element name origins
Day 6: A periodic table of the origins of the elements
Day 7: A periodic table of elements used in batteries
Day 8: A periodic table of endangered elements
Day 9: A periodic table of element applications
Day 10: A periodic table of common ions
Day 11: A periodic table of element sources
Day 12: A periodic table of the human body’s elements
Day 13: A periodic table of elements in the Earth’s crust
Day 14: A periodic table of elements in the sea
Day 15: A periodic table of element hazard symbols
Day 16: A periodic table of elements in mobile phones
Day 17: A periodic table of medical uses of the elements
Day 18: A periodic table of the colours of the elements
Day 19: A periodic table of annual element production volumes
Day 20: A periodic table of element isotopes
Day 21: A periodic table of elements in song names
Day 22: A periodic table of element mistakes
Day 23: A periodic table of element prices
Day 24: A periodic table of element data
Don’t forget you can also return to previous years’ Chemistry Advent calendars. 2018’s highlighted a range of key figures in chemistry history, while 2017’s (and those of previous years) highlighted various examples of festive chemistry.