11)Which of the following ions would be iso-electronic with Ar? Iso-electronic means same number of electrons. Hint, look up element in the periodic table and use the atomic number as the number of electrons for the neutral atom. If the element has a negative charge, add that number to the amount of electrons. If it has a positive charge, subtract that number Example F-has 10 electrons (Fluorine has 9 electrons but the minus one makes it 10) A) A13 B) 0-2 C) CT D) Mg+2 E) Ne