Review with students that in lesson two they focused on the number of protons, neutrons, and electrons in the atoms in each element. In this lesson, they will focus on the arrangement of the electrons ...

Researchers at Johannes Gutenberg University Mainz (JGU) and the Helmholtz Institute Mainz (HIM) have developed a novel ...

Bromine is one of only two liquid elements. Iodine is solid. They exist as diatomic molecules - they have two atoms in each molecule. As you go down the group the halogens become less reactive.

The elements are chemically bonded together in a specific ratio ... of atoms. The formula of a compound shows how many atoms of each element are bonded together. The formula is made up of symbols ...

Scientists have now confirmed the existence of a new element, No. 115 on the periodic table, by slamming atoms into each other.

Treutlein's group manipulated BEC atoms trapped on an "atom chip," fabricated from gold wires and housing a rudimentary atomic clock. Under normal conditions, all atoms can collide with each other.