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 ( 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) x= y =

 The  number  that would   be  in the  place  of x  and Y   is

x=2

Y=1

Hence   the formula will   be K2Se

 Explanation

When  K+   which is positively  charged  combine with selenide (se2-)  which  is negatively charged they form an ionic  bond K2Se.

x=2, y=1

Explanation:

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chemical properties are the characteristic of matter which can only be observed by changing the chemical identity of a sample like flammability reactivity and toxicity.