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Nonmetallic elements that are lusterless and nonmalleable; they are mostly gases and solids and are usually poor conductors of heat and electricity.
Radioactive element that is extremely rare in nature; it is used in medicine to study the thyroid gland and to detect cancerous tumors.
Solid that is used especially in pharmaceuticals (revulsives, antiseptics), in photography and dyes; it is also essential for the human body.
Very toxic liquid that is used mainly to manufacture teargas, dyes and disinfectants and in photography and medications.
Solid used especially in fertilizer (phosphates), matches and pyrotechnics (fireworks); it is also necessary for human beings.
Solid that is quite common in nature; it is used in car batteries, fertilizer, paint, explosives, pharmaceuticals and rubber.
Abundant toxic gas that is used to whiten fabric and paper, disinfect water and manufacture various other products (solvents).
Gas that is used especially for enriching uranium and manufacturing antistick coatings; it is present in bones and teeth.
Gas that is the most abundant element on Earth and that comprises about 20% of the atmospheric air; it is used to breathe and in the manufacture of steel.
Gas that constitutes about 78% of the Earth’s atmosphere, present in all animal and vegetable tissue (proteins), and in fertilizer, ammonia and explosives.
Element common in its pure state (diamond, graphite) or found in combination (air, coal, petroleum); it is present in animal and plant tissue.