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Alkali metals are the members of group 1 . They have only 1 electron in their outermost energy levels. To be stable they need to lose only that single electron in the outermost energy level thus forming mono positive ions .
Alkaline metals on the other hand have 2 electrons in their outermost energy level . They are members of group 2 . To be stable they lose these 2 electrons to form di positive ions.
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Alkali metals are members of Group I. They have only one electron in their outermost energy levels. To be stable they need to lose only that single electron in the outermost energy level thus forming monopositive ions. ... To be stable, they lose these two electrons to form dipositive ions.
Mg2+ ion is smaller than O2- ion though both are iso-electronic. The nuclear charge in Mg2+ is + 12 and O2- is + 8, so with the increase in nuclear charge the size decreases and, hence O2- > Mg2+.
account the following a) third period has 8 and not 18 elements. b) alkali metals do not form dipositive ions. c) noble gases usually do not react with other elements.
They have only one electron in valence shell thats why
Alkaline metals on the other hand have two electrons in their outermost energy level. They are members of Group II. To be stable, they lose these two electrons to form dipositive ions.
metals have only one electron in valence shell, so they can loose one electron too form a mono positiveions only. while alkali earthmetals have two electrons in there valance shell so they loose two electrons toform a dipositive ion.
because as we know that alkalies belong to 1 st group and 1st group elements having 1 valence electron in their outermost shell...!!
so they don't form dipositive ions!!
hope this helps you
the stability of hydrides decreases down the group from nh3 to bih3 due to decrease in their bond dissociation enthalpy result in the increases of reducing character. reducing character is directly related to the ease of losing hydrogen.
write the answer of substantiate fluoride has the lowest solubility among group one metal fluorides