1 valence electron
Alkali metals have 1 electron in their outer shell.
the alkali metals have 1 electron in their outer most shell. in order to obtain a full outer shell they have to lose this electron. so when they react with another metal they lose this electron and the outer most shell.
Alkali earth metals have 2 electrons in their outer energy level. This outer level is known as the valence shell, and having 2 electrons makes these metals highly reactive and likely to form ionic bonds to achieve a full outer shell of 8 electrons.
because they have outer electrons than can merge with other elements. all elements want to have full outer electron shells, and they only have a few outer electrons.
alkali metals have 1 electron in there outer valence shell. I remember that alkali and alkaline go with columns 1 & 2 of the periodic table alphabetically. Alkali then alkaline. Alkali metals have 1 valence electron. Alkaline metals have 2 valence electrons.
Alkali metals lose one electron when it becomes an ion.
Neither of these metals hold onto their outer electron (singular, as they are alkali metals) very strongly. Relatively speaking though, lithium holds onto its outer-most electron more strongly than Sodium does.
False. Alkali metals lose one electron to form a stable electron configuration with a full outer shell of electrons, which is the stable electron configuration for these elements.
1 electron in the s orbital
The noble gasses have a full outer shell of 8 electrons, called on octet (except for helium, which has 2). This is a stable configuration and other elements undergo chemical reactions to approximate it. By contrast the alkali metals have only one outer shell electron which they readily lose in order to go down to the full outer shell below it. The electrons in the lower shells also shield the outer electron from the nucleus, so there is less attraction and the electron is only held loosely. By contrast a noble gas in the same row of a given alkali metal has the same number of electron shells, but the positive charge on its nucleus, so there is a greater force of attraction holding the electrons in place.
If you are referring to the alkali metals of Group 1, such as sodium and potassium, the answer is no - in fact with a valence of 1 they are short 7 electrons in their outer level, which is why they react so readily (and violently) with the halogens, chlorine, fluorine and so on.
The outer electron configuration of an alkali metal is one electron in the s subshell. This electron is easily lost to form a cation with a full valence shell, resulting in the high reactivity of alkali metals.