Final answer:
The highly reactive metal with compounds including table salt, lye, and baking soda is sodium (Na), belonging to the Alkali Metals group in the periodic table.
Step-by-step explanation:
The soft, highly reactive metal that has compounds including table salt, lye, and baking soda is sodium (Na). Group 1, known as the Alkali Metals, contains elements such as lithium (Li), sodium (Na), potassium (K), rubidium (Rb), cesium (Cs), and francium (Fr). Sodium and potassium, in particular, are the seventh and eighth most abundant elements in Earth's crust. Sodium is known for forming compounds such as sodium chloride (table salt) and sodium bicarbonate (baking soda), and it is also used in the manufacture of many organic compounds.