Lanthanum
91Actinium — (pronEng|ækˈtɪniəm) is a radioactive chemical element with the symbol Ac and atomic number 89, which was discovered in 1899, the earliest discovered of the radioactive elements.CharacteristicsActinium is a silvery, radioactive, metallic element.… …
92Curium — This article is about the chemical element. For the ancient city located in Cyprus, see Kourion. americium ← curium → berkelium …
93Hafnium — lutetium ← hafnium → tantalum Zr ↑ Hf ↓ Rf …
94Periodic table — This article is about the periodic table of the elements . For other uses, see The Periodic Table. The periodic table of the chemical elements (also known as the periodic table or periodic table of the elements) is a tabular display of the 118… …
95Ytterbium — Yb redirects here. For the unit of information, see Yottabit. thulium ← ytterbium → lutetium ↑ Yb ↓ No …
96Stable isotope — Graph of isotopes/nuclides by type of decay. Orange and blue nuclides are unstable, with the black squares between these regions representing stable nuclides. The unbroken line passing below many of the nuclides represents the theoretical… …
97Mendeleev's predicted elements — Professor Dmitri Mendeleev published the first Periodic Table of the Atomic Elements in 1869 based on properties which appeared with some regularity as he laid out the elements from lightest to heaviest. [ cite… …
98Bastnäsite — Infobox mineral name = Bastnäsite category = Carbonate mineral boxwidth = boxbgcolor = imagesize = caption = formula = (Ce,La,Y)CO3F molweight = color = Honey yellow, reddish brown habit = Tabular to equant striated crystals, also granular,… …
99Amorphous metal — Samples of amorphous metal, with millimeter scale An amorphous metal is a metallic material with a disordered atomic scale structure. In contrast to most metals, which are crystalline and therefore have a highly ordered arrangement of atoms,… …
100Abundance of the chemical elements — Estimated proportions of matter, dark matter and dark energy in the universe. Only the fraction of the mass and energy in the universe labeled atoms is composed of chemical elements. The abundance of a chemical element measures how relatively… …
