An atom that has 84 protons and 86 neutrons undergoes a reaction. At the end of the reaction, it has 82 protons and 84 neutrons. What happened to the atom?
A scientist notices that a lump of niobium is warm to the touch and wonders if nuclear reactions are taking place in the metal. How can she find out?
An isotope undergoes radioactive decay by emitting radiation that has a –1 charge. What other characteristic does the radiation have?
Which statement correctly compares chemical reactions with nuclear reactions?
In alpha decay, alpha particles are ejected from the nucleus. Which equation represents alpha decay?




What is a key difference between chemical and nuclear reactions?
What type of particle has no mass or charge?
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