<span>When 18O (Oxygen) is struck by a proton, 18F (Fluorine) and another particle are produced. This other particle produced by +Beta decay is a positron, or </span><span>1 /0n (Option #6 in the choices you provided)</span>
No it’s -3 not +3 There is an order on the periodic table Group 1 =+1 Group2=+2 Group 3=+3 Group 5=-3 (which is the group p is in) Group 6=-2 Group 7=-1