Which electron configuration represents an
excited state for a potassium atom?
(1) 2-8-7-1 (3) 2-8-8-1
(2) 2-8-7-2 (4) 2-8-8-2

Which factor is likely to impact the possible number of compounds? presence of unlimited number of elements in the periodic table the inability of atoms to align perfectly with other atoms the ability of all elements to react with every other element all elements being equally reactive