Atoms of i-131 spontaneously decay when the(1) stable nuclei emit alpha particles
(2) stable nuclei emit beta particles
(3) unstable nuclei emit alpha particles
(4) unstable nuclei emit beta particles

Answer;

(4) unstable nuclei emit beta particles

Atoms of I-131 spontaneously decay when the unstable nuclei emit beta particles.

Explanation;

-Unstable nuclides undergo spontaneous change or the spontaneous decay by emitting radiations to attain stability. Stability of isotopes is based on the ratio of neutrons and protons in its nucleus. Although most nuclei are stable, some are unstable and spontaneously decay, emitting radiation.

coral.

explanation:

coral. many marine organisms that produce calcium carbonate shells or skeletons are negatively impacted by increasing co2 levels and decreasing ph in seawater.

the answer is 1260

you spend 7 hours in school for 1 school day with 5 school days in 1 school week with 36 school weeks in a school year.

7*5*36= 1260 it's all about multiplying