Group 1 (Alkali Metals)

Group 1, known as the alkali metals, includes elements like lithium, sodium, and potassium. These metals are highly reactive, especially with water, producing hydrogen gas and alkaline solutions. They have a single electron in their outermost shell, which makes them tend to lose that electron easily, leading to their reactivity. Alkali metals are soft, can be cut with a knife, and have low melting points compared to other metals. They are often used in batteries, fireworks, and chemical manufacturing. Due to their reactivity, they are stored under oil or in inert gases to prevent them from reacting with moisture or air.