Los metales alcalinos

The video tutorial explains the properties and reactivity of alkali metals, which include lithium, sodium, and potassium. These metals are highly reactive due to having one outer electron, and they react vigorously with water, releasing hydrogen gas and forming alkaline solutions. The reactivity increases down the group due to additional electron shells. Alkali metals are soft, have low densities, and low melting points. They do not occur freely in nature but are found in compounds like sodium chloride. The video also highlights the trends in reactivity and physical properties as you move down the group.

What makes alkali metals very reactive?

Describe the reaction of lithium with water.

What happens to the reactivity of alkali metals as you move down the group?

What are some observed trends in the properties of alkali metals as you move down the group?

Explain why alkali metals do not appear in nature as loose elements.