Question 1

Which method is illustrated in the image for determining the formula of an ionic compound formed between lithium and oxygen?

Accepted Answer

The criss-cross method

Question 2

What is the correct formula for the compound formed between lithium ions ($$\mathrm{Li^+}) $$and oxide ions ($$\mathrm{O$$^{2-}$$}) $$using the criss-cross method?

Accepted Answer

$$\mathrm{Li_2O}$$

Question 3

Why must the overall charge of an ionic compound be zero?

Accepted Answer

Because ionic compounds are electrically neutral

Question 4

Which of the following best describes the process of forming an ionic bond between lithium and oxygen?

Accepted Answer

Transfer of electrons from lithium to oxygen

Question 5

Given the ions $$\mathrm{Li^+}$$ and $$\mathrm{O$$^{2-}$$}$$, what is the ratio of lithium ions to oxide ions in the resulting compound?

Accepted Answer

2:1

Question 6

If the charge on the cation is $$+1$$ and the charge on the anion is $$-2$$, what is the correct way to balance the charges in the formula of the ionic compound?

Accepted Answer

Use two cations for every one anion

Question 7

Which of the following statements about the criss-cross method is correct?

Accepted Answer

It uses the magnitude of the ion charges as subscripts for the other ion

Question 8

What would be the formula for an ionic compound formed between $$\mathrm{Al$$^{3+}$$}$$ and $$\mathrm{O$$^{2-}$$}$$ using the criss-cross method?

Accepted Answer

$$\mathrm{Al_2O_3}$$

Question 9

Which of the following is a correct statement about the formation of $$\mathrm{Li_2O}$$?

Accepted Answer

Two lithium atoms each lose one electron to one oxygen atom

Question 10

If a compound is formed between $$\mathrm{Ca$$^{2+}$$}$$ and $$\mathrm{Cl^-}$$, what is its correct formula using the criss-cross method?

Accepted Answer

$$\mathrm{$$CaCl_2$$}$$

Study Guide: Ionic Compounds and Electron Configurations

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