Consider the reaction below. 21(aq)+C12(9) -
->2014(aq)+12(aq)
Which half reaction correctly describes the reduction that is taking place?
O Cl2(g) +2e - →2014 (aq)
O Cl2(g) +2 —>2014 (aq)
O2(aq) —>2(aq)+ 2e
O 2 (aq) — 12(aq)+e

16. why must the number of electrons lost equal the number of electrons gained in every redox reaction? use 3 – 4 sentences in your own words to address this question. 18. what type of radiation is emitted when chromium-51 decays into manganese-51? show the nuclear equation that leads you to this answer. 19. a radioactive nucleus alpha decays to yield a sodium-24 nucleus in 14.8 hours. what was the identity of the original nucleus? show the nuclear equation that leads you to this answer.