For each of the compounds below, show that the charges on the ions add up to zero. a. kbr b. cao c. li(2)o d. cacl(2) e. alcl(3)

A) Potassium Bromide KBr

KBr = K⁺Br⁻

Sum of Charges = (+1) + (-1) = 0

B) Calcium oxide CaO

CaO = Ca²⁺O²⁻

Sum of charges = (+2) + (-2) = 0

C) Lithium oxide Li2O

Li₂O = Li⁺O²⁻

Sum of charges = 2*(+1) + (-2) = 0

D) Calcium chloride CaCl2

CaCl₂ = Ca²⁺Cl⁻

sum of charges = (+2) + 2(-1) = 0

E) Aluminum chloride AlCl3

AlCl₃ = Al³⁺Cl⁻

Sum of charges = (+3) + 3(-1) = 0

4d^55s^1 ( third choice)