Which is of these nonmetals are more reactive— bromine or krypton? explain.

 The  non metal  which  is  more reactive  is bromine

         Explanation

Bromine is in group 17 ( group  of halogens)  which has  one unfilled  spot  in its valence shell.  

Krypton is group 18 ( groups  of noble gases)  which do not  react with  other element  in normal condition due  to  their  filled valence electron.

Therefore since  bromine  has unfilled  valence shell  it is  more reactive  than krypton.

thats how its supposed to be

the correct answer is b. a strong acid completely dissociates to its ions when dissolved in water. completely dissociates to and ions. a is incorrect because does not fully ionize to and ions and some remain as the compound . c and d are incorrect because, and do not fall into the category of bronsted lowry acids. a bronsted lowry acid is a proton donor and since both molecules do not have a proton to donate they are not bronsted lowry acids. likewise,   if we use the lewis acid definition, they cannot be acids. a lewis acid is an electron pair acceptor. both and have a complete octet so can not accept any electrons which disqualifies them as acids.