Instability of an atoms nucleus can result from an excess of either neutrons or protons . So neutrons and protons .
I would say the energy has to be decreased by 87 kj because the bonding is held together by 87 kj so removing that should prevent the bonding from taking place or reverse it I believe. In other words, a certain amount of energy is required to hold the bond together and in the absence of that energy, the bonding will not take place.
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It helps us develop our obervation skills and we learn what the egg looks like. We can learn the nutritional values of the egg.
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Hope that helped
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The mass number of an isotope is the total number of protons and neutrons in an atomic nucleus. If you know that a nucleus has 6 protons and 6 neutrons, then its mass number is 12. If the nucleus has 6 protons and 7 neutrons, then its mass number is 13.
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