Atomorf

Hydrogen is the most abundant chemical substance in the Universe, constituting roughly 75% of all baryonic mass.

Hydrogen is the chemical element with the symbol H and atomic number 1.

It is a soft, silvery-white alkali metal.

Lithium is a chemical element with the symbol Li and atomic number 3.

It is a soft, silvery-white, highly reactive metal.

Sodium is a chemical element with the symbol Na and atomic number 11.

Potassium is a silvery-white metal that is soft enough to be cut with a knife with little force.

Potassium is a chemical element with the symbol K and atomic number 19.

Caesium has physical and chemical properties similar to those of rubidium and potassium.

Caesium is a chemical element with the symbol Cs and atomic number 55.

It is commonly known as quicksilver and was formerly named hydrargyrum.

Mercury is a chemical element with the symbol Hg and atomic number 80.

It is a gray post-transition metal that is not found free in nature.

Thallium is a chemical element with the symbol Tl and atomic number 81.

Lead is soft and malleable, and also has a relatively low melting point.

Lead is a chemical element with the symbol Pb (from the Latin plumbum) and atomic number 82.

Elemental bismuth may occur naturally, although its sulfide and oxide form important commercial ores.

Bismuth is a chemical element with the symbol Bi and atomic number 83.

Polonium was named after Marie Curie's homeland of Poland.

Polonium is a chemical element with the symbol Po and atomic number 84.

The bulk properties of astatine are not known with any certainty.

Astatine is a radioactive chemical element with the symbol At and atomic number 85.