Now this is an effective way for co-curators to remember the names of elements… have the elements explode! Five out of the six Alkali metals react with air and water: Lithium (Li), Sodium (Na), Potassium (K), Rubidium (Rb), and Caesium (Cs).
Get Facts About Sodium: Sodium metal chunks under mineral oil.
10 Fun Facts About Potassium: These are chunks of potassium metal. Potassium is a soft, silvery-white metal that quickly oxidizes.
Alkali Metals - Properties of Element Groups
Microscopic Photos of the Periodic Table of Elements - Lithium (Li)