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In which of the following sets is the symbol of the element, the number of protons, and the number of electrons given correctly?
a. In, 49 protons, 49 electrons
b. Zn, 30 protons, 60 electrons
c. Cs, 55 protons, 132.9 electrons
d. F, 19 protons, 19 electrons

Sagot :

a.In,49 protons,49 electrons
a. In, 49 protons, 49 electrons
In is Indium. It's atomic number is 49.