In the periodic table, potassium stands at the head or beginning of the fourth period. It is found in group 1. The third period ends with argon having 18 electrons. This implies that potassium should have at least 18 core electrons. Since it is found in group 1 having only 1 valence electron, it is expected to also have one valence electron.
Its electron configuration summarizes these statements above; 1s22s22p63s23p64s1
There are 18 core electrons and one valence electron in the outermost 4s1 orbital (the fourth shell)
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"W<span>rite a formula for a paint coating" is the one among the following choices given in the question that a chemist is likely to do. The correct option among all the options that are given in the question is the first option or option "1". I hope that this answer has actually come to your help.</span>
