Which explains why more energy is released in nuclear reactions than in chemical reactions? chemical reactions are always endothermic. no molecular bonds are broken in nuclear reactions. protons and neutrons are exchanged in chemical reactions. in nuclear reactions, mass is converted to energy.

More energy is released in nuclear reactions than in chemical reactions; this is because in nuclear reactions, mass is converted to energy. Nuclear energy released in nuclear fission and fusion is several 100 million times as large as an ordinary chemical reaction like the combustion process. The reason why nuclear energy release so much energy is because tremendous amounts of energy is released at one time. The nuclei in a nuclear reaction undergo a chain reaction, causing the neutrons to move extremely fast and release high amounts of energy. 

In nuclear reactions, mass is converted to energy.

So what is the question

Aform of energy that is reflected or emitted from objects in the form of electrical and magnetic waves that can travel through space. there are many forms of  electromagnetic  energy including gamma rays, x rays, ultraviolet radiation, visible light, infrared radiation, microwaves and radio waves.