The property that best characterises the noble gases is: OA) their great chemical activity OB) they are all solids OC) they are the rarest elements that exist D) they are not very reactive chemically OE) they are all gases at absolute zero Question 14 (1 point) In a phosphorus atom, the number of valence electrons is: C $ 4 A) 5 % M 5 t 6 87 *00 8