Today, the periodic table is organized by atomic number, which is the number of protons in the nucleus. But they didn’t know about protons then, so they organized everything by atomic weight.

There's a clever design to the Periodic Table. Can you guess why every element has its own special spot? See if you're right with BBC Bitesize.

It is In this form that chemistry students today are familiar with "that chart on the laboratory wall." Read also. Dmitry Mendeleev or the teachings of a prophet, UNESCO Courier, April-June 2019.

I mean it was a joke, obvs. Oh, the good old periodic table. You've probably seen one before, maybe on the wall of your science class or maybe on cool T-shirts like this. There's even a song about it.

This year, the periodic table of chemical elements celebrates its 150th birthday. As the candles on the cake are lit, it's time to test your knowledge, with our quiz.

This is a big year for the Periodic Table of the Elements as the world celebrates the 150th anniversary of Dmitri Mendeleev's creation. We can now lays eyes on a fascinating relic of its history.

You know the periodic table that hung on the wall of every science class you took at school? As of today, it’s wrong. Or more precisely, it's inaccurate.

You may remember the periodic table of the elements as a dreary chart on your classroom wall. If so, you never guessed its real purpose: It’s a giant cheat sheet. We have 10 things you didn’t know ...

Probably the periodic table of antimatter—the anti–periodic table. Antimatter is the mirror image of the regular old matter all around us. Instead of our negatively charged electrons, there ...

It's time to replace your periodic table again: four new elements have been added to the tail end of the familiar chart. IE 11 is not supported. For an optimal experience visit our site on another ...

There's a clever design to the Periodic Table. Can you guess why every element has its own special spot? See if you're right with BBC Bitesize.