What does radioactive decay leave behind

AMSWER:

There are two main types of radiation that can be given off during radioactive decay. The first is particle radiation. It includes alpha and beta particles as well as proton and neutron radiation. The second is electromagnetic radiation.

EXPLANATION:

Radioactive decay is the process by which an atomic nucleus emits particles or electromagnetic radiation to become either a different isotope of the same element or an atom of a different element.

answer: 802.3 kilo joules of energy represents 191.75 kilo calorie of energy.

explanation:

energy released during combustion of one mole methane = 802.3 kilo joules

if 1 kilo joule = 0.239006   kilo calorie

then ,802.3 kilo joule will be = 802.30.239006 kilo calorie

802.3 kilo joule = 191.75 kilo calorie

hence, the energy in kilo calorie is 191.75 kilo calorie.