How many electrons are present in a tin atom with a mass number of 119?

Question

Quizplus · Accepted Answer

To find the number of electrons in an atom, we need to know its atomic number. The atomic number of tin (Sn) is 50. The mass number of the tin atom given in the question is 119, which is the sum of the number of protons and neutrons in the nucleus. Since the number of protons in an atom is equal to the atomic number, 50 in this case, the number of neutrons can be calculated by subtracting the atomic number from the mass number:

Number of neutrons = Mass number - Atomic number = 119 - 50 = 69

Since the atom is electrically neutral, it must have the same number of electrons as protons. Therefore, the number of electrons in a tin atom with a mass number of 119 is 50.

How Many Electrons Are Present in a Tin Atom with a Mass