But the periodic table contains still more; the heaviest so far is element 118, oganesson, a “super-heavy” element with 118 protons and a half-life of half a millisecond.

Gallium is one of the most mind-blowing elements on the periodic table, and this video will take you deep into its strange ...

Such bombs, when they detonated, further filled out the periodic table. Starting in 1952, the United States blew up hydrogen bombs around the Marshall Islands.

In this periodic table of elements quiz, you have 10 minutes to name as many elements as you can, given only their symbol, atomic weight and the broad group they live in.

In other words, it contains elements not on the periodic table at all. These elements would be stable around atomic number 164, which is far denser that Osmium, the densest known naturally ...

The periodic table on the website of the International Union of Pure and Applied Chemistry avoids making a decision about whether La and Ac or Lu and Lr are group 3 elements.

Show students that you have 80 cards (4 for each of the first 20 elements). Before distributing the cards, explain that each card contains information about electrons and energy levels for the first ...

So Julie Hu ’22 started a project two years ago to remake the periodic table into a colorful work of art that could suggest the variety of benefits, and many stories, behind the letters and numbers.