* Highly reactive: Alkali metals are the most reactive metals. They react vigorously with water, oxygen, and even nitrogen in the air. This makes them extremely difficult to find in their pure form.

* Found in compounds: Alkali metals are found in various minerals and salts. For example, sodium is found in common table salt (NaCl), potassium in potash (K₂O), and lithium in spodumene (LiAlSi₂O₆).

* Extraction is challenging: To obtain alkali metals in their pure form, complex and specialized extraction methods are required. These methods involve electrolysis of molten salts, which is a complex and energy-intensive process.

In summary: Alkali metals are found in compounds, but their extreme reactivity makes them difficult to find in their pure, elemental form.