The halogens, alkali metals, and alkaline earth metals have valence electrons, respectively.

The halogens, alkali metals, and alkaline earth metals have 7, 1, and 2 valence electrons, respectively.

The following information regarding the valence electrons is:

Halogen - 7 elements that required one electron for the octet rule that could be accomplished. Alkali metals - one element that lost the single electron for creating the octet and cation.Alkaline Earth meals - 2 elements that lost two electrons for creating 2 + cations.

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The valence electrons are as follows for these groups of elements:

Halogen- SEVEN  (halogens are group 7 elements that need one electron for the octet rule to be achieved)

Alkali Metals - ONE  (these are group one elements that lose a single electron to form an octet and cation)

Alkaline Earth Metals - TWO (group two elements that lose two electrons to form 2+ cations)

Answerit curves up and levels out.explanationwe assume that the container contains absolutely no ammonia to begin with as it states that "nitrogen gas and hydrogen gas" react to "produce ammonia."at dynamic equilibrium, the product and reactant concentrations are equal.this means that, starting from a concentration of zero, [nh₃] must curve "up" from zero and then level out to a constant concentration.