Here, a chemist describes group 15 and the crucial role they play in life. The elements that make up each column of the periodic table share a set of common traits. U.S.

The periodic table of the elements isn't as confusing as it looks. When you purchase through links on our site, we may earn an affiliate commission. Here’s how it works. Scientists had a ...

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.

Atoms in the same column (group) in the periodic table have the same number of valence electrons. Summary. Students will again focus on the first 20 elements. Students will first look at a diagram and ...

If you are intimidated by the periodic table, then this introduction through the first column of elements will give you a feel for how and why the elements are arranged in this order.

Over the decades, even as the 18-column table proliferated in major chemistry books, some scientists have tried to improve upon it. The Latvian chemist Edward Mazurs compiled hundreds, but a few are ...

So the beauty of the periodic table is that the elements that are in columns, up and down, have similar properties. But there are similarities within a group going across too.

The periodic table stares down from the walls of just about every chemistry lab. ... Today they are arranged in the table's 17th column (or group 17 as chemists prefer to call it.) ...

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.