Number of hybridised orbitals, which form non-bonding molecular orbitals in H2O, BF3 and NH3 molecules respectively, are:​

radioactive decay occurs in unstable atomic nuclei – that is, ones that don't have enough binding energy to hold

the nucleus together due to an excess of either protons or neutrons.

pie chart because it is in percents ( % )

you did not give any options thus this is the best answer i can give to you with this little information you have given

> they are both natural and not man made

> they can be tracked and predicted by the right tools

-love shrooms