1 Choose An Element…. 2 Smoke Particles If a cell containing smoke is observed through a microscope; the smoke particles are seen to move around erratically.
Periodic table Groups – Columns down Alkali Metals Alkaline Earth Metals Halogens Noble gases Periods – Rows across Lanthanides Actinides Groups – Columns.
Chapter 3 Atoms and the Periodic Table. Reactivity Groups reactivity METALS As orbits are added the electrons move further away from nucleus and become.
