Circuits and magnetism help?

9)There is not strict difference between elements.But i don't know the use of it so far.Better assume as used to be the elements and their isotopes.It is for chemical reaction that there are exist too with them.10)Once there is decay there is half life for simplest presenting.And in that decay not appear new elements.It is not nuclear reaction.For best pure reaction use the 100% elements in reactors because small bit of pollutions will stay very big not controlled substances.5) Electricity is moving energy,magnetism is bending space about any mass.So it is very different themes.There were works about them together simply.