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Question

20 . If the number of neutrons in the nucleus of the atom is 30, and the atomic number is 40, what is the mass number of that atom? ​

Answer

70 Explanation: The atomic number represents the quantity of protons inside an atom. In contrast, the mass number signifies the sum of neutrons and protons present within the atom's nucleus. In this case, the mass number of 70 is obtained by adding 30 neutrons and 40 protons. I trust this clarification has been beneficial to you.