Question 1

Which of the following correctly identifies aluminum and oxygen as either a metal or a nonmetal?

Accepted Answer

Aluminum is a metal; oxygen is a nonmetal.

Question 2

How many valence electrons does an atom of aluminum have?

Accepted Answer

$$3$$

Question 3

How many valence electrons does an atom of oxygen have?

Accepted Answer

$$6$$

Question 4

To achieve a stable octet, how many electrons must an aluminum atom lose or gain?

Accepted Answer

Lose $$3$$ electrons

Question 5

To achieve a stable octet, how many electrons must an oxygen atom lose or gain?

Accepted Answer

Gain $$2$$ electrons

Question 6

What is the correct symbol, including ionic charge, and name for the ion formed by aluminum?

Accepted Answer

$$\mathrm{Al}^{3+}$$, aluminum ion

Question 7

What is the correct symbol, including ionic charge, and name for the ion formed by oxygen?

Accepted Answer

$$\mathrm{O}^{2-}$$, oxide ion

Question 8

Which of the following best explains why aluminum forms a $$3+$$ ion?

Accepted Answer

Aluminum has $$3$$ valence electrons and loses them to achieve a stable octet.

Question 9

Which of the following best explains why oxygen forms a $$2-$$ ion?

Accepted Answer

Oxygen gains $$2$$ electrons to complete its valence shell.

Question 10

A patient is exposed to high levels of aluminum ions. Which of the following is the correct chemical symbol for the ion present in the patient's body?

Accepted Answer

$$\mathrm{Al}^{3+}$$

Question 11

Which of the following electron configurations represents the oxide ion ($$\mathrm{O}^{2-}$$)?

Accepted Answer

$$1s^2$$\ $$2s^2$$\ $$2p^6$$

Question 12

Which of the following statements is true regarding the formation of ions for aluminum and oxygen?

Accepted Answer

Aluminum loses electrons and oxygen gains electrons.

Question 13

If an aluminum atom reacts with an oxygen atom, what is the formula of the compound formed?

Accepted Answer

$$\mathrm{Al}_2\mathrm{O}_3$$

Question 14

Which of the following best describes the process by which aluminum and oxygen achieve noble gas configurations?

Accepted Answer

Aluminum loses $$3$$ electrons; oxygen gains $$2$$ electrons.

Question 15

A sample contains both $$\mathrm{Al}^{3+}$$ and $$\mathrm{O}^{2-}$$ ions. What is the total charge on a formula unit of $$\mathrm{Al}_2\mathrm{O}_3$$?

Accepted Answer

$$0$$

Ions and Valence Electrons: Aluminum and Oxygen

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