Answer
a) $K^{+}$ : 19 protons, 18 electrons.
b) $Mg^{2+}$ : 12 protons, 10 electrons.
c) $Fe^{3+}$ : 26 protons, 23 electrons.
d) $Br^{-}$ : 35 protons, 36 electrons.
e) $Mn^{2+}$ : 25 protons, 23 electrons.
f) $C^{4-}$ : 6 protons, 10 electrons.
g) $Cu^{2+}$ : 29 protons, 27 electrons.
Work Step by Step
Number of protons= Atomic number.
Number of electrons = Atomic number - charge.
Using the above facts, we can reach the solution.
