Potassium bromide is used in some countries as a sedative in veterinary medicine. The formula of potassium bromide is KBr. Which statement explains why potassium bromide has this formula?

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Question

Potassium bromide is used in some countries as a sedative in veterinary medicine. The formula of potassium bromide is KBr. Which statement explains why potassium bromide has this formula?

Accepted Answer

One K⁺ ion and one Br⁻ ion give a neutral compound — Award 1 mark for identifying that one K⁺ and one Br⁻ give a neutral compound with ratio 1:1. A is incorrect because ionic compounds do not share electrons. C is incorrect because potassium forms positive ions (K⁺) and bromine forms negative ions (Br⁻). D is incorrect because potassium loses electrons, not gains them.

Answer

One K⁺ ion and one Br⁻ ion give a neutral compound

Answer

Each potassium atom gains one electron from a bromine atom

Answer

Potassium has a charge of -1 and bromine has a charge of +1

Answer

Potassium and bromine atoms share one pair of electrons

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