Calculations or numericals

Q: How we can calculate mass number,  numbers of proton and neutrons,    ₉¹⁹F,₃₆⁸⁴Kr,₄₇¹⁰⁷Ag  and how numbers of proton is equal to the numbers of electrons.

                                                       ₉¹⁹F         ₃₆⁸⁴Kr       ₄₇¹⁰⁷Ag  

Mass numbers (A)   =                    19                 84              107

Numbers of proton (Z) =                  9               36                47

Numbers of neutron (A-Z) =          10               48                 60

Number of -ive = Number of +ive= 9                36               47

Q: test your self ?

₂₀⁴⁰Ca   ,    ₂₉⁴⁰Cu     ,  ₅₃¹²⁷I,      ,    ₇₈¹⁹⁵Pt  

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