<span>The correct answer is, Alkali Metals</span>
The chemical structure of 2,2,3-trimethylbutane is shown as attached document. In a condensed structural formula, a branched chain is shown in bracket ().
So according to the chemical structure, the correct condensed structural formula for this molecule is CH3C(CH3)CH(CH3)2
<span>The electron stable state configuration in atoms is best seen in the inert gas configuration.
Inert gas are the most stable since they have their valence electron shell saturated with electrons (the valence shell has the maximum number of electrons it can hold). They need neither donate nor accept electrons.</span>