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The periodic table is how we arrange all of the known chemical elements, and group similar ones together. These elements are what form everything in the world.
They can be a solid, liquid or gas, depending on temperature, and most occur naturally, for example oxygen, sodium, carbon, helium and gold.
Each square on the table includes a number, as well as some letters.
The letters are simply the chemical name for each element, eg copper is ‘cu’, while the number is the the atomic number (or proton number). This is the number of protons found in the nucleus of every atom of that element.
There are currently 118 known elements, of these 94 are believed to exist naturally on Earth.
The modern periodic table was created in 1869 by the Russian chemist Dmitri Mendeleyev.
The modern periodic table consists of horizontal rows, which are called, and vertical columns, which are called groups.
There are 18 of these in the modern periodic table, each represented by a vertical column.
Hydrogen, Helium, Lithium, Beryllium…Adamantium? Unobtainium?...er…the Infinity Stones?...HORCRUXES?!?
OK, so perhaps we don’t remember the precise order of everything on the periodic table of elements, but probably you’re far better versed with it than we are.
However, if you’re looking for some new and interesting ways of teaching it to your students we’ve picked out some of the best resources available.
Pupils should be taught about:
If you need decent-sized images to print out or share on devices then we’ve got a couple here. One has the colour coding, one does not.
You can download and print them here.
The Royal Society of Chemistry’s interactive periodic table features history, alchemy, podcasts, videos, and data trends across the periodic table.
You can click each element to read detailed information, and the tabs at the top to explore each section. Plus, you can use the buttons to change your view of the table. We tried it and it was like a child messing with the Christmas tree light settings.
It also includes Murray Robertson’s Visual Elements images (seen in the picture above), which aim to produce a vibrant representation of the elements, not just by rendering images of their physical appearance but also by investigating the manner in which they affect our daily lives in largely unseen and often unexpected ways. Fancy.
Try it out at rsc.org/periodic-table.
Taking its inspiration from the recent discovery of new elements in the periodic table, this chemistry lesson from Dr Joanna Rhodes is intended to get your students thinking about about how elements have been discovered, named and organised according to rules set by the International Union of Pure and Applied Chemistry.
The students are then tasked with coming up with their own element names, and deducing the positions of various elements in the periodic table by investigating their properties.
Finally, they contemplate whether we may have reached the ‘end’ of of the periodic table – and if not, what the implications would be if any new, heavier elements were to be discovered.
Download this free lesson plan here.
This one’s just for fun. If you’re not familiar with Tom Lehrer’s song listing all of the elements you should be, and your students should be too. If for nothing else it’s worth it for his audacious effort to rhyme ‘Harvard’ with ‘discovered’.
Give it a watch in class.
To many students being introduced to it for the first time, the periodic table will be mostly a random assortment of sciency words, and even with the ones they have heard of they might struggle to name a use for it.
This series of videos on stem.org explore the chemistry of the modern world by asking colleagues, celebrities and scientists to choose their favourite element and explain why they liked it so much.
It’s a great way to get a glimpse into what different scientists are doing with various elements today, and learn a bit about each one along the way.
Watch them all here.
This short TedEd video and accompanying questions and resources look at why Dmitri Mendeelev’s periodic table is the one that has endured, even though the elements had been listed and carefully arranged, and even organised by similar properties before.
Lou Serico explains via Ekaaluminium, an element whose existence Mendeelev predicted decades before it was discovered why this might be the case.
It’s full of enthusiasm without delving into trainspotter levels of fanboying, with lines like: “The periodic table isn’t just another trendy icon. It’s a massive slab of human genius, up there with the Taj Mahal, the Mona Lisa, and the ice cream sammich.”
Watch, and learn, here.
These information sheets detail each element and their uses in the form of the periodic table, and includes a handful of suggested activities.
Download the PDF here.
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