Students explore the attractions and motion of atoms and molecules as they experiment with and observe the heating and cooling of a solid, liquid, and gas.

Developing the periodic table The periodic table ... Metals are mostly solids;, non-metals liquids or gases.

Accompanying Lesson Plan: Lesson 3.2: Finding Volume—The Water Displacement Method The chart shows that atomic size and mass for the first 20 elements in the periodic table. The size of the atoms and ...

Everything in the world is made from about 100 different chemical elements that join together in different ways to form all the solids, liquids and gases we see around us. All of the elements have ...