Alkaline earth metals

Elements for Kids Alkaline Earth Metals The alkaline earth metals are a group of elements in the periodic table. Occurrence, properties, and uses Prior to the 19th century, substances that were nonmetallic, insoluble in water, and unchanged by fire were known as earths.

Alkali metal

The last element is the least abundant: They announced the discovery of a new element on 26 Alkaline earth metals to the French Academy of Sciences. Discovery[ edit ] The calcium compounds calcite and lime have been known and used since prehistoric times.

The chemistry of francium is not well established due to its extreme radioactivity ; [31] thus, the presentation of its properties here is limited.

With the exception of radium, all the metals and their compounds find commercial application to some degree, especially magnesium alloys and a variety of calcium compounds. Most strontium is found in the minerals celestite and strontianite. You can help by adding to it. Radium is a rare element, and all its isotopes are radioactive.

Alkaline earth metal

The physical properties of francium are even sketchier because the bulk element has never been observed; hence any data that may be found in the literature are certainly speculative extrapolations.

The mass of the Earth is approximately 5. In turn, the natural history of the Earth caused parts of this planet to have differing concentrations of the elements.

It is composed mostly of iron Magnesium is also the lightest structural metal, and its compounds are widely used in construction and medicine.

The discovery was announced by Davy on 30 June at a lecture to the Royal Society. Most of their typical compounds are therefore ionic: Alkaline earths were thus distinguished from the alkalies and from other earths, such as alumina and the rare earths.

Strontium was eventually isolated in by Sir Humphry Davy by electrolysis of a mixture of strontium chloride and mercuric oxide.

The salts are colourless unless they include a coloured anion negative ion.The alkaline earth metals are a group of elements in the periodic ultimedescente.com are all in the second column of the periodic table.

They are sometimes referred to as the group 2 elements. Alkaline Earth Metals. The alkaline earth metals are in the second group of the periodic table.

Some characteristics of alkaline earth metals are: An oxidation number of +2 which makes them very reactive.

Not found freely in nature. Present in the earth's crust but not in their basic form.

The alkaline earth metals are one group of elements on the periodic table. Here is a look at the properties of these elements: Location of the Alkaline Earths on the Periodic Table The alkaline earths are the elements located in Group IIA of the periodic table.

This is the second column of the table. Lithium, the lightest of the alkali metals, is the only alkali metal which reacts with nitrogen at standard conditions, and its nitride is the only stable alkali metal nitride. While most metals form arsenides, only the alkali and alkaline earth metals form mostly ionic arsenides.

The oxides of the alkaline-earth metals are basic (i.e., alkaline, in contrast to acidic). A fairly steady increase in electropositive character is observed in passing from beryllium, the lightest member of the group, to radium, the heaviest.

Alkaline-earth metal

The alkaline earth metals are named after their oxides, the alkaline earths, whose old-fashioned names were beryllia, magnesia, lime, strontia, and baryta.

These oxides are .

Download
Alkaline earth metals
Rated 3/5 based on 8 review