Question 1 options: Potassium forms ions with a charge of + 1 (K+). Iodine forms ions with a charge of - 1. Selenium forms ions with a charge of - 2 (Se2-). Imagine that Potassium ions and Selenide ions combine to form Potassium Selenide. What numbers would be in the place of X and Y in: KXSeY (Use the number 1 even if it isn't strictly necessary)
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