Its product is heavier than each of its reactants. Hence, option C is correct.
What is a mass number?
The number of protons and the number of neutrons determines an element's mass number: mass number = protons + neutrons.
¹⁴₇N + ¹₁H → ¹⁵₈O
In the reaction above, we can conclude within the given conditions of the reaction that the product formed is heavier than the reactants.
The product is oxygen with a mass number of 15 as shown by the superscript preceding the symbol of the atom.
The reactants are:
Nitrogen, N with a mass number of 14
Hydrogen, H with a mass number of 1
The mass number is a true reflection of the mass of an atom. It clearly shows the mass of the nucleons which are the most massive particles that make up an atom. The nucleons are protons and neutrons that make up the tiny nucleus of the atom.
Oxygen here has more nucleons than each Nitrogen and Hydrogen.
Hence, option C is correct.
Learn more about the mass number here:
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