Elements: Metals, Nonmetals, and Metalloids

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Copper is classified as a metal; known for excellent electrical conductivity.
Potassium, a highly reactive alkali metal, is important for biological functions.
Aluminum is lightweight, corrosion-resistant, and widely used in packaging and construction.
Calcium, an essential element for living organisms, plays a crucial role in bone health.

Oxygen is vital for respiration in most living organisms and is a reactive element.
Helium is a noble gas, characterized by being non-reactive and used in balloons and cryogenics.
Hydrogen is the most abundant element in the universe and a key component of water.

Boron is utilized in glass and ceramic industries; it exhibits properties of both metals and nonmetals.
Silicon is crucial in semiconductor technology and the manufacturing of computer chips.
Polonium is a radioactive metalloid with applications in nuclear devices and as a heat source in space missions.