Alkali Metals Song Periodic Table

The video tutorial introduces the alkali metals of the periodic table, focusing on lithium, sodium, potassium, rubidium, cesium, and francium. Each element is described in terms of its atomic number, mass, protons, neutrons, and electrons. The tutorial highlights unique properties, such as sodium's presence in table salt and rubidium's reactivity. The origins of element symbols and names are also discussed, providing a comprehensive overview of these reactive metals.

Explain the reactivity of rubidium as described in the text.

What can you tell about cesium's atomic structure based on the information provided?