The one electron in its valence shell would most likely be donated to form a positively charged ion.
Potassium is an element of group one. This element is univalent and has a valency of one. This implies that the outermost shell of the potassium atom is composed of only one electron.
Potassium forms a univalent positive ion which occurs by the loss of the one electron in the outermost shell of the potassium atom.
Thus, the one electron in its valence shell would most likely be donated to form a positively charged ion.
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