Arsenic (As)
a semi-metal commonly used as a poison

Bismuth (Bi)
a white, crystalline, brittle metal with a pinkish tinge found in some medicines

Boron (B)

Calcium (Ca)

Carbon (C)
one of the most important chemical elements

Cesium (Cs)

Copper (Cu)
one of the most useful metals for more than 5,000 years

Hafnium (Hf)

Helium (He)

Iron (Fe)
the fourth most abundant element on Earth

Mercury (Hg)
a silver-colored metal that is actually liquid at room temperature

Nickel (Ni)
a white metallic chemical element often used in alloys

Nobelium (No)

Phosphorus (P)
a non-metallic element that all animals and plants need for normal growth

Silicon (Si)
the second most common element in the Earth's crust

Silver (Ag)
the best conductor of heat and electricity among the metals

Sulfur (S)
a solid, nonmetallic element that is essential to plants and animals

Technetium (Tc)
the first synthetic element

Thorium (Th)
a radioactive metal

Tin (Sn)
a silvery white metal

Uranium (U)
a silvery-white, radioactive metal