alkali metals?

Question

hi , we all know while alkali metals ( 1A) are beside the air , there will be oxide on them .
does anyone know that the oxide contains what ? and any info about the things that has made it .

hi , we all know while alkali metals ( 1A) are beside the air , there will be oxide on them .
does anyone know that the oxide contains what ? and any info about the things that has made it .

I don't mean m2o or any thing , i meant the elements that are used in the oxide

while alkali metals ( 1A) are beside the air , a complex mixure of some elements would apear on them . what are those elements & plz give some info about them . they're not neccessary elements they can be a mixure of some elements

Answer 1

If a material is covered in an oxide it is covered with a compound of oxygen and that element. An oxide is a compound of oxygen.

Answer 2

Your English is difficult to understand.

I think what you wanted to ask is: "when alkali metals (1A) are exposed to air, a compound layer is formed on them. what are those compounds and please give some info about them."

The layer of compounds formed is the oxide of the alkali metal. Sodium forms Na2O, Lithium forms Li2O, etc. They are very poisonous and reactive with water to form hydroxides.

If there is any water in the presence of the metals hydrogen gas will be produced and the hydroxide, (NaOH, LiOH, etc.), is formed. These are very caustic bases and are toxic to humans.

These reactions are quick and can be explosive so they must be done carefully. They become more explosive the greater the atomic mass of the alkali metal.

Answer 3

Chemical properties
Oxides are formed in redox reactions through oxidation in which a reducing agent is allowed to react with molecular oxygen (O2) or oxidizing agents which contain oxygen, such as hydrogen peroxide (H2O2) and permanganate (MnO4−). Oxides are characterized by a redistribution of electrons, in which the oxygen atoms have a net surplus of electrons and the other atoms a net lack. In oxides of hydrogen, carbon, nitrogen, sulfur, phosphorus and halogens, covalent bonds occur between oxygen and the other elements. Generally, these are gases or fluids at room temperature. Oxides of metals occur as ionic compounds, or salts, which are solid at room temperature. Oxide salts are generally insoluble in water, though some react with it.

Generally, oxides are not conductive to electricity. This property is most commonly taken advantage of with silicon dioxide, as silicon can easily be oxidized and the resulting part can be made into a transistor. This is the basis for much of modern computer technology.

[edit]
Types of oxides
Oxides of more electropositive elements tend to be basic. They are called basic anhydrides; adding water, they may form basic hydroxides. For example, sodium oxide is basic; when hydrated, it forms sodium hydroxide.

Oxides of more electronegative elements tend to be acids. They are called acid anhydrides; adding water, they form oxoacids. For example, dichlorine heptoxide is acid; perchloric acid is a more hydrated form.

Some oxides can act as both acid and base, at different times. They are amphoteric. An example is aluminium oxide. Some oxides do not show behavior as either acid or base.

The oxides of the chemical elements in their highest oxidation state are predictable and the chemical formula can be derived from the number of valence electrons for that element. Even the chemical formula of ozone is predictable as a group 16 element. One exception is copper for which the highest oxidation state oxide is copper(II) oxide and not copper(I) oxide. Another exception is fluoride that does not exist as expected as F2O7 but as OF2 with the least electronegative element given priority. [1]. Phosphorus pentoxide, the third exception is not properly represented by the chemical formula P2O5 but by P4O10

http://en.wikipedia.org/wiki/Oxide

Answer 4

If the metal is M, then its is the simple oxides like M2O or superoxides like MO2.

Li also gives some Nitride, Li3N

Answer 5

Maybe they will react with carbon to form carbonates or sulfur to form SO4's(tetraoxosulfates) and other reactive combos with highly electronegative elements that might be in the air at the time.

Answer 6

It will contain oxides of the metal concerned (e.g. for AL it will be AL oxide)

Answer 7

in air they oxidixe to the oxide. it's just the metal oxide in most cases.