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 ...

Elements and Compounds: Understanding elements and compounds is basic knowledge to study chemistry. Elements are the basic building blocks of matter, while compounds are substances formed when two or ...

Students learn to classify matter as elements, compounds, and mixtures. Matter: Classification of Matter: Students learn to classify matter as elements, compounds, and mixtures and to distinguish ...

This video explains ionic bonding. An ionic compound is made up of charged particles, called ions. It has a giant lattice structure, with strong electrostatic forces of attraction.

"Quick Tips: Resources for Teachers” is a series of short videos providing down-to-earth advice and instructional tips to teachers of STC™, our signature science curriculum. Each “Quick Tip” offers ...