Darmstadtium

Introduction Darmstadtium is a radioactive chemical element with an atomic number of 110 in the periodic table. Classified as transfermium, darmstadtium does not occur naturally in Earth’s crust. This noble metal has two valence electrons and belongs to the transuranium family of periodic table elements. Fact Box Chemical and Physical Properties of Darmstadtium The symbol … Read more

Actinium

Introduction Actinium is a rare-earth element that belongs to the family of actinides in the periodic table. The actinide series of elements is highly significant due to their radioactive properties. They comprise a group of 15 chemical elements that share the same chemical and physical properties.    Fact Box Physical and Chemical Properties of Actinium … Read more

Lanthanum

Lanthanum (La)   Introduction   Lanthanum is a chemical element with atomic number 57 in the periodic table. In Earth’s crust, element 57 is mainly contained as the ferromagnetic metal cobalt (Co). This rare-earth metal is classified as a member of the lanthanides family of chemical elements.    As a transition metal, lanthanum is a … Read more

Cerium (Ce)

Cerium is a chemical element with an atomic number of 58 in the periodic table of elements. It’s the most abundant rare-earth metal that is found in Earth’s crust. Being a member of the lanthanides family of periodic table elements, this transitional element from period 6 in the periodic table of elements has four valence … Read more

Praseodymium

Praseodymium (Pr) Introduction Praseodymium is a chemical element with the atomic number 59 in the periodic table. It occurs naturally in Earth’s crust with an abundance of 9.5 parts per million. However, praseodymium can be rarely found in its pure, elemental form.    Being a member of the lanthanides family of elements, this highly reactive … Read more

Neodymium

Neodymium (Nd) Introduction Neodymium is a chemical element with the atomic number 60 in the periodic table. Despite being classified as a rare-earth element, neodymium is widely distributed in Earth’s crust. It mainly occurs in the mineral ores. As a member of the lanthanide series of periodic table elements, this rare-earth metal has three valence … Read more

Promethium

Promethium (Pm) Introduction Promethium is a chemical element with the atomic number 61 in the periodic table. Although it’s an artificially produced substance that cannot be found in Earth’s crust, promethium can also occur in trace amounts in the uranium ores.    Element 61 is classified as a member of the lanthanides family of the … Read more

Samarium

Samarium (Sm) Introduction Samarium is a chemical element with the atomic number 62 in the periodic table. With an abundance of 6 parts per million, it’s the 40th most abundant chemical element in Earth’s crust.    Being a member of the lanthanides family of periodic table elements, this rare-earth element is a divalent substance that’s … Read more

Europium

Introduction Europium is a chemical element with an atomic number of 63 in the periodic table of elements. It’s one of the least abundant rare-earth elements that can be traced in Earth’s crust. Being a member of the lanthanides family of periodic table elements, europium is a divalent chemical element that makes it one of … Read more

Gadolinium

Introduction Gadolinium (Gd) is a chemical element with an atomic number of 64 in the periodic table of elements. There’s about 6.2 mg/kg of this soft metal occurring in Earth’s crust. This makes gadolinium one of the most abundant rare-earth elements found in nature. Being a member of the lanthanides family of periodic table elements, … Read more