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Element

Hafnium

Hafnium is a chemical element that has the symbol Hf and atomic number 72. A lustrous, silvery gray tetravalent transition metal, hafnium resembles zirconium chemically and it is found in zirconium minerals.

Element

Lutetium

Lutetium is a chemical element with the symbol Lu and atomic number 71. A metallic element, lutetium usually occurs in association with yttrium and is sometimes used in metal alloys and as a catalyst in various processes.

Element

Ytterbium

Ytterbium is a chemical element with the symbol Yb and atomic number 70. A soft silvery metallic element, ytterbium is a rare earth of the lanthanide series and is found in the minerals gadolinite, monazite, and xenotime.

Element

Thulium

Thulium is a chemical element that has the symbol Tm and atomic number 69. A lanthanide element, thulium is the least abundant of the rare earths.

Element

Erbium

Erbium is a chemical element with the symbol Er and atomic number 68. A rare, silvery, white metallic lanthanide; Erbium is a solid in its normal state.

Element

Holmium

Holmium is a chemical element with the symbol Ho and atomic number 67. Part of the lanthanide series, holmium is a relatively soft and malleable silvery-white metallic element.

Element

Strontium

Strontium is a chemical element with the symbol Sr and the atomic number 38. An alkaline earth metal, strontium is a soft silver-white or yellowish metallic element that is highly reactive chemically.

Element

Terbium

Terbium is a chemical element with the symbol Tb and atomic number 65. Terbium is a silvery-white rare earth metal that is malleable, ductile and soft enough to be cut with a knife.

Element

Gadolinium

Gadolinium is a chemical element that has the symbol Gd and atomic number 64.

Element

Europium

Europium is a chemical element with the symbol Eu and atomic number 63. It was named after the continent Europe.

Element

Samarium

Samarium is a chemical element with the symbol Sm and atomic number 62. Samarium is a rare earth metal, with a bright silver luster, that is reasonably stable in air; it ignites in air at 150 °C.

Element

Neodymium

Neodymium is a chemical element with the symbol Nd and atomic number 60.

Element

Praseodymium

Praseodymium is a chemical element that has the symbol Pr and atomic number 59. Praseodymium is a soft silvery metal in the lanthanide group.

Element

Cerium

Cerium is a silvery metal, belonging to the lanthanide group. It resembles iron in color and luster, but is soft, and both malleable and ductile.

Element

Potassium

Potassium is a chemical element. It has the symbol K and atomic number 19. Potassium is a soft silvery-white metallic alkali metal that occurs naturally bound to other elements in seawater and many minerals.

Element

Sulfur

Sulfur or sulphur is the chemical element that has the atomic number 16. It is denoted with the symbol S. It is an abundant multivalent non-metal. Sulfur, in its native form, is a yellow crystalline solid.

Element

Phosphorus

Phosphorus is the chemical element that has the symbol P and atomic number 15. A multivalent nonmetal of the nitrogen group, phosphorus is commonly found in inorganic phosphate rocks.

Element

Silicon

Silicon is the chemical element that has the symbol Si and atomic number 14. A tetravalent metalloid, silicon is less reactive than its chemical analog carbon.

Element

Aluminium

Aluminium is a silvery white and ductile member of the boron group of chemical elements. It has the symbol Al; its atomic number is 13.

Element

Magnesium

Magnesium is a chemical element with the symbol Mg, the atomic number 12, and an atomic mass of 24.31. Magnesium is the ninth most abundant element in the universe by mass.