B because A is for radios of course and C is thermal energy and D is radioactive
It creates oxygen which every living thing needs to live. i hope this helps! :)
Valence electrons are the electrons in the outermost shell of an element on the periodic table. Atoms want to be able to have a full outer shell and they can share or trade electrons in order to achieve this. Valence electrons are also super super important in chemical reactions. The number of valence electrons determines what group that specific atom or element is in on the periodic table. This affects the reactivity of the element.
Chemists have developed insulation.
