The total numbers of neutrons,protons,and electrons in ¹³⁸Ba²⁺ are ________.

Question

Quizplus · Accepted Answer

To find the number of neutrons, add the atomic masses of the isotopes and subtract the number of protons (atomic number). 
S1U1P1138S1S1P0BaS1U1P12 has isotopes with atomic masses 113, 138, and 12. So, the number of neutrons is: 
(113 + 138 + 12) - 56 - 54 - 2 = 82 
The total number of protons is given by adding the atomic numbers of all the elements: 
(16 + 1 + 84 + 56 + 16 + 1 + 56 + 16 + 1 + 0 + 56 + 16 + 1 + 0) = 338 
And finally, the total number of electrons is equal to the total number of protons since the atom is neutral: 338. 
Therefore, the answer is B (82 neutrons, 56 protons, 54 electrons).

The Total Numbers of Neutrons,protons,and Electrons in 138Ba2+ Are ________

The Total Numbers of Neutrons,protons,and Electrons in ¹³⁸Ba²⁺ Are ________