Answer :
Final answer:
An atom of tin with a mass number of 118 and an atomic number of 50 has 50 electrons.
Explanation:
First, let's understand the meaning of the mass number and atomic number. The mass number of an atom is the total sum of protons and neutrons in the nucleus. The atomic number of an atom is the number of protons. Given that the mass number is 118 and the atomic number is 50, we can determine the number of neutrons by subtracting the atomic number from the mass number. So, the number of neutrons is 118-50=68. Since atoms are neutral and have no overall charge, the number of electrons is equal to the number of protons, which is 50. Therefore, an atom of tin has 50 electrons.
Learn more about Atomic structure here:
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