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an atom with an atomic number of 12 and a mass number of 25 can best decided by which of these

Sagot :

Answer:

An atom that contains 12 protons

Explanation:

Atomic number is the same as how many protons and electrons an atom has. The mass is how many protons and neutrons there are together. In this case it would be 25 (mass) - 12 (protons) = 13 (neutrons).