Did You Know? Only One Letter of the Alphabet Is Missing from the Entire Periodic Table!

Posted on Sep 26, 2026
tl;dr: The letter 'J' is the only letter in the English alphabet that you won't find in any of the 118 element names on the periodic table.

Hey there, curious friend! Ever just stumble upon one of those little quirks of the universe that makes you go, ‘Wait, really?!’ Well, I’ve got one for you that bridges the gap between language and hardcore science, and it’s quite neat.

So, you know the periodic table, right? All those boxes with letters like ‘H’ for Hydrogen, ‘O’ for Oxygen, ‘Fe’ for Iron, and so on? It’s a fundamental part of chemistry, listing every single known chemical element. There are 118 of them in total, each with a name and a symbol.

Now, here’s the fun part: If you were to take a grand tour through the names of all 118 elements – from the very first, Hydrogen, all the way to Oganesson, the heaviest one – and you meticulously checked off every letter of the English alphabet as you encountered it, you’d find something pretty surprising.

You’d tick off A, B, C… you’d get X in Xenon, Z in Zinc, Q in Roentgenium (named after Wilhelm Conrad Röntgen, though the element symbol is Rg), and even the tricky ‘Y’ in Yttrium. But after going through every single element, you would realize that one, single, solitary letter of our alphabet is completely, utterly, and absolutely absent. It just never shows up!

Ready for it? It’s the letter J.

Isn’t that wild? Every other letter of the alphabet makes an appearance at least once in the name of an element on the periodic table, but ‘J’ is completely left out in the cold. It’s not in German, French, Latin, or Greek names, which are often the roots for element names, either. It’s just this peculiar linguistic blind spot in the world of chemical elements. It’s one of those little nuggets of information that, once you know it, you can’t un-know it, and it just makes you look at the periodic table (and the alphabet!) with a slightly new, more amused perspective. Pretty cool, huh?