Elements

Elements are the smallest units of matter that can’t be divided using chemical means. They are the building blocks of matter. Learn the names of the elements and get facts about them.


Periodic Table of Radioactive Elements 1
Technetium is a radioactive element, with no stable isotopes. With an atomic number of 43, it is the lightest unstable element. All of the elements surrounding it on the periodic table have at least one stable isotope. What is it about technetium that makes it special? The short answer is […]

Why Is Technetium Radioactive?



CPK-Jmol Periodic Table
Chemistry departments often have kits of plastic balls to stick together to represent atoms and their arrangement in molecules. These kits come with several different colors to easily distinguish one element from another. The choice of color for each atom is not arbitrary. The color code of these atoms is known as CPK colors.

Molecule Atom Colors – CPK Colors




A neutral tritium atom contains one proton, two neutrons, and one electron.
Tritium is the radioactive isotope of the element hydrogen. It is also known as hydrogen-3 or using the shorthand notation T or 3H in chemical formulas and reactions. The nucleus of the tritium atom, called a triton, contains one proton and two neutrons. The word tritium comes from the Greek […]

Tritium Facts (Hydrogen Isotope)


Gallium Crystals (foobar)
Gallium is a chemical element with atomic number 31 and element symbol Ga. It is considered to be a post-transition metal or basic metal. Gallium is known for its low melting point, which lends itself to the gallium spoon demonstration and even melting the pure metal in your hand. Here […]

Gallium Element Facts