Save guides, add subjects and pick ... periodic table. That thing that you see behind your teacher on the wall in science lessons. It actually tells us a lot about the elements that make up ...

But how many of these elements do you know? Test your knowledge and compete with other Live Science readers to see who can come top in our periodic table quiz. The periodic table of elements is a ...

Mendeleev left blank spaces in his original periodic table so that he could properly line up the known elements. Gallium, element 31, was his first gap to be filled, in 1875. The star of a popular ...

And for chemistry, no cause for celebration surpasses the origin of the periodic table of the elements ... of known chemistry. Read up on the tales between the lines. Other chemists perceived ...

What's on the horizontal line is going across ... the atomic number goes up. So the number of electrons has to go up. So the beauty of the periodic table is that the elements that are in columns ...

We're all familiar with the elements of the periodic table, but have you ever wondered ... and those chemical "fingerprints" make up the visible spectra at the heart of chemical spectroscopy.

You wouldn’t know it, because it’s hiding down there at the bottom of the periodic table of elements, but it’s a prank—something a five-year-old might do—and the guy who did it was one ...

Save guides, add subjects and pick ... periodic table. That thing that you see behind your teacher on the wall in science lessons. It actually tells us a lot about the elements that make up ...