Lanthanum usually occurs together with cerium and the other rare earth elements. Although it is classified as a rare earth element, lanthanum is the 28th most abundant element in the Earth's crust, almost three times as abundant as lead.
| Name | Lanthanum |
|---|
| Normal Phase | Solid |
| Family | Rare Earth Metals |
| Period | 3 |
| Cost | $64 per gram |
Lanthanum has no biological role in humans but is essential to some bacteria. It is not particularly toxic to humans but does show some antimicrobial activity. Lanthanum usually occurs together with cerium and the other rare earth elements.
Word origin: Lanthanum is named after the Greek word lanthanein, which means to escape notice. Discovery: Swedish chemist Carl Gustaf Mosander extracted lanthanum oxide, or lanthana, from an impure cerium nitrate in 1839. In 1923, a relatively pure form of lanthanum was isolated.
Precautions. Neodymium metal dust is combustible and therefore an explosion hazard. Neodymium compounds, as with all rare-earth metals, are of low to moderate toxicity; however, its toxicity has not been thoroughly investigated. Breathing the dust can cause lung embolisms, and accumulated exposure damages the liver.
Lanthanum and actinium are usually regarded as d-block elements (Myers, Oldham & Tocci 2004, p. 130) and generally counted as lanthanides and actinides (the rest of which occupy the f-block).
The Elements, sorted by Atomic Number
| Atomic Number | Symbol | Name |
|---|
| 13 | Al | Aluminum |
| 14 | Si | Silicon |
| 15 | P | Phosphorus |
| 16 | S | Sulfur |
213Bi is an isotope of actinium. This means actinium does indeed kill cancer cells, but eventually new mutations may form. Actinium 227 is very radioactive and as dangerous as plutonium when speaking of radiation-induced health issues. Ingesting even small quantities is a serious hazard to health.
Actinium classified as an element in the Actinide series as one of the "Rare Earth Elements" which can located in Group 3 elements of the Periodic Table and in the 6th and 7th periods. Most of the elements in the Actinide series are synthetic or man-made.
Edit. Francium is a very unstable metal. Francium has a silvery, and gray color to it. No one has tasted francium because francium is very rare and it would kill you.
Actinium is a soft, silvery-white, radioactive, metallic element. Its estimated shear modulus is similar to that of lead. Owing to its strong radioactivity, actinium glows in the dark with a pale blue light, which originates from the surrounding air ionized by the emitted energetic particles.
Actinium is a rare element that is present in uranium ores in tiny amounts, but it is usually cheaper and easier to create actinium when it is needed by bombarding radium with neutrons in a nuclear reactor. Actinium's most stable isotope, actinium-227, has a half-life of 21.77 years.
Actinium is a chemical element with the symbol Ac and atomic number 89. Actinium gave the name to the actinide series, a group of 15 similar elements between actinium and lawrencium in the periodic table.
The Greek symbol 'alpha' and metallic 'rays' are representative of the element as a source of alpha radiation, and also the origin of its name. Actinium is a soft, silvery-white radioactive metal. It glows blue in the dark because its intense radioactivity excites the air around it.
Actinium itself glows in the dark and reacts with water to produce hydrogen gas. It also reacts with air and acids, but not bases. It is used in thermoelectric power sources and also used in neutron emitters.
Lanthanum is never found in nature as the free element. Lanthanum is found in the ores monazite sand [(Ce, La, etc.) PO4] and bastn°site [(Ce, La, etc.)( CO3)F], ores containing small amounts of all the rare earth metals.
Lanthanum is a soft, malleable, ductile, silver-white metal. Lanthanum is naturally found in sediments.: it oxidizes rapidly in air and it reacts with water to form the hydroxide.
Lanthanum itself is sometimes considered to be a d-block element, because it has no electrons in an f orbital, but it does have one electron in a d orbital. It has also been argued that, because the word lanthanide literally means "like lanthanum", lanthanum itself cannot be a lanthanide.
Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity. A freshly exposed surface of pure copper has a pinkish-orange color.
The reserves of this element are thought to be in the region of 6 million mt. Despite being one of the 'rare earths', Lanthanum is probably one of the least rare, occurring in a tonnage similar to that of lead and tin combined!
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a solid. Lanthanum classified as an element in the Lanthanide series as one of the "Rare Earth Elements" which can located in Group 3 elements of the Periodic Table and in the 6th and 7th periods.
Copper is a chemical element with the symbol Cu (from Latin: cuprum) and atomic number 29. It is a soft, malleable, and ductile metal with very high thermal and electrical conductivity.
Uses of Neodymium
Neodymium is used with iron and boron to create powerful permanent magnets, also called NIB magnets. NIB magnets are used in computers, cell phones, medical equipment, toys, motors, wind turbines and audio systems. Neodymium is used as a crystal (neodymium-doped yttrium aluminum garnet) in lasers.Its existence was predicted by Dmitri Mendeleev in 1869, though it was not identified until 1923, by Coster and Hevesy, making it the last stable element to be discovered. Hafnium is named after Hafnia, the Latin name for Copenhagen, where it was discovered.
Lanthanum and other rare-earth compounds are used in carbon arc lighting, specifically in the film and television industry for studio lighting and projection. Lanthanum oxide (La2O3), also called lanthana, improves the alkali resistance of glass and is used in making camera lenses and in other special glasses.
No, Lanthanum can not exist in +4 oxidation states. Lanthanum can lose only 3 electrons, two from the s-subshell and one from the d-subshell to attain the noble gas configuration. So, it can not show the +4 oxidation state.
Lanthanum and actinium are usually regarded as d-block elements (Myers, Oldham & Tocci 2004, p. 130) and generally counted as lanthanides and actinides (the rest of which occupy the f-block).
Possibility of Hazardous Reactions: Flammable when exposed to heat, spark or flame. Reacts vigorously with acids releasing flammable hydrogen gas. Hazardous Decomposition Products: Lanthanum oxides, lanthanum hydroxides, hydrogen gas.
| Name | Lanthanum |
|---|
| Boiling Point | 3469.0° C |
| Density | 6.7 grams per cubic centimeter |
| Normal Phase | Solid |
| Family | Rare Earth Metals |
Lanthanum is a chemical element with symbol La and atomic number 57.
Elements can be classified based on their physical states (States of Matter) e.g. gas, solid or liquid. This element is a gas. Nitrogen is classified as an element in the 'Non-Metals' section which can be located in groups 14,15 and 16 of the Periodic Table.
