Considering its electron configuration, how many valence
electrons are in Cs (Cesium)?
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3 valence electrons

Explanation:

There are only 5 electrons in the outer shell of Cesium so it needs to gain 3 to become stable. The number of electrons an atom needs to lose or gain to become stable is the same as the number of valence electrons. Therefore, the answer is 3.

in chemistry, a solution’s concentration is how much of a dissolvable substance, known as a solute, is mixed with another substance, called the solvent. the standard formula is c = m/v, where c is the concentration, m is the mass of the solute dissolved, and v is the total volume