The modern version of this chemical element chart has been tweaked to account for the quantum theory that governs the arrangement of electrons surrounding the nucleus and the outermost electrons that ...

Our Concept of the Chemical Element Modified by Study of Radio-Active Change. Skip to main content. Scientific American. August 2, 1919. 5 min read. What is a Chemical Element?

The periodic table of chemical elements, often called the periodic table, organizes all discovered chemical elements in rows (called periods) and columns (called groups) according to increasing atomic ...

Elements are the chemical building blocks of matter. Everything in the universe that takes up space is made of elements. There are 92 elements found in nature and another 20 or so that scientists ...

All the latest science news on chemical elements from Phys.org. Find the latest news, advancements, and breakthroughs.

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.

All matter–oceans, land, atmosphere, humans, animals, plants, food, materials, products, buildings–is made from 118 known chemical elements. These elements are ordered in the periodic table of ...