We learn the periodic table as the elements arranged according to the atomic number, which is an integer, a whole number. That's the number of protons in an atom of that element.

The periodic table has been given four new elements, changing one of science’s most fundamental pieces of knowledge. Elements 113, 115, 117 and 118 will now be added to the table’s seventh row ...

“Just over 150 years since Dmitri Mendeleev wrote down the periodic table of elements, we are now finally in the position to start filling in those last blanks of understanding where everything ...

Only a Few Grams of This Element Exist—and Scientists Have Used It to Break the Rules of the Periodic Table Doesn’t “organometallic sandwich” sound appetizing? By Darren Orf Published: Mar ...

The rare earths start at lanthanum, Element 57, and run to lutetium, Element 71, and if you look them over, there's a good chance you won't recognize any of them.

The scientists who worked on the A-bomb were not allowed to call element 94 “plutonium.” Every ingredient in the bomb was top secret, so they gave it a false cover; they called it “copper.” ...

of students memorize the periodic table of elements. But they’re likely in your pocket. The average smartphone contains a number of these rare earth elements, known as the lanthanide series of the ...