Chemical reactions occur when elements or compounds combine and create new compounds. Elements are substances that contain only one type of atom and are represented by unique symbols on the periodic ...

Everything we can see and touch, and quite a lot that we can’t as well, is made of tiny particles called atoms. Some substances, like particles of this iron, contain only one kind of atom. Iron is an ...

Molecular Solids: Composed of individual molecules held together by relatively weak intermolecular forces (van der Waals ...

Students will learn how to categorize matter as either pure substances or mixtures. Students will apply tests, based on physical properties of matter samples, to determine whether a mixture is ...

Non-metal chemistry encompasses the study of elements and compounds that, by virtue of their electronic configurations and bonding characteristics, do not exhibit metallic properties. This field spans ...

Although present in very small amounts, selenium (Se)-based compounds play important roles in protecting the body from ...