Question

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)

Answer 1

The South would destroy the nation, so the North had to fight for the nation’s survival.

Step-by-step explanation:

Answer 2

Given:

Charge on potassium (K) = +1

Charge on selenium (Se) = -2

To determine:

The values of X and Y in K(X)Se(Y)

Step-by-step explanation:

The molecule which is formed between K and Se is neutral.

The K+ and Se2- ions should combine such that the net charge on the molecule is zero.

X(K+) + Y(Se2-) = 0

X(+1) + Y(-2) = 0

The simplest solution to the above equation is obtained when X = 2 and Y = 1

Thus, the molecule would be: K₂Se₁

Ans: X = 2 and Y = 1; K₂Se₁