Pinpoint #776Clues & Solution

Lead is a heavy metallic element (Pb) known since antiquity, used in pipes, batteries, and radiation shielding

Iron (Fe) is the most common element on Earth by mass, essential for steel production and a key component of hemoglobin in blood

Silicon (Si) is a metalloid widely used in semiconductors, solar cells, and as the primary material in computer chips

Carbon (C) is the basis of all known life, forming the backbone of organic chemistry and appearing as diamond and graphite

Oxygen (O) is a reactive nonmetal essential for respiration, making up about 21% of Earth's atmosphere