An unstable isotope that naturally decays can emit which of the following? choose all correct responses, there are at least two. {hint: probably are more than two}
question options:
a) alpha particle
b) beta particle
c) radiation
d) positron
e) gamma rays
f) visible light

Isotopes are the species which have same number of protons but differs in the number of neutrons. Or in other words isotopes have same atomic number but different mass number. Isotopes are generally unstable and decays to an stable isotope. When the isotope is unstable it releases energy in the form of radiations. It emits alpha particle, gamma rays, and beta particles.

Therefore, the correct option is (A),(B) and (C)

i do not get it   at all