What Everything Is Made Of
Part of the Atomic Structure section of Coddy's Chemistry journey. Lesson 1 of 45.
Everything around you is matter, and all matter is made of tiny particles called atoms. A single grain of salt holds more atoms than there are stars in our galaxy.
A substance made of only one kind of atom is an element. There are 118 known elements, and every material is built from them, the way every word is built from letters.
The periodic table: one box for every element
The periodic table lists every element in a box with its symbol: H for hydrogen, O for oxygen, Na for sodium, Cl for chlorine, N for nitrogen.
Challenge
Water is made of hydrogen and oxygen. Table salt is made of sodium (Na) and chlorine (Cl). Air is mostly nitrogen (N), oxygen, and a little argon (Ar). Tap every element that water, salt and air are made of.
Try it yourself
Test yourselfThis lesson includes a short quiz. Start the lesson to answer it and track your progress.
All lessons in Atomic Structure
1Matter and Atoms
What Everything Is Made OfElements, Compounds, MixturesChemical SymbolsCounting Atoms in a FormulaRecap - Molecule Kit