Question

alkali metal is monovalent. give reason ?​

Answer 1

ALAKLI METALS ARE MONOVALENT, AS THERE IS ONLY ONE ELECTRON IN THEIR OUTERMOST VALENCE SHELL.

Answer 2

Answer:

These elements are collectively known as the alkali metals. ... Thus, all the alkali metals have one valence electron, ns1 outside the noble gas core. They readily lose this one electron to attain more stable noble gas configuration and give monovalent M+ ions, where M is any alkali metal.

As a result of their low first ionization energies, the alkali metals have an overwhelming tendency to form ionic compounds where they have a +1 charge. All the alkali metals have relatively high electron affinities because the addition of an electron produces an anion (M−) with an ns2 electron configuration.