Question

1. select the answer that shows the words in the correct order to complete the sentence. the octet rule states that atoms tend to form bonds so that each atom has eight __________ in its __________ shell. a. protons; core b. electrons; valence c. neutrons; inner d. electrons; middle 22. which of the following lewis structures correctly represent cacl₂? a. :cl:⁻ ca²⁺ :cl:⁻ b. :cl: ca²⁺ :cl:⁻ c. :cl:⁻ ca :cl:⁻ d. :cl:⁻ ca²⁺ :cl:⁻

Explanation:

• For question 21: The octet rule is about electrons. Atoms want to have eight electrons in their valence (outermost) shell. Protons are in the nucleus and not related to the octet rule in this context. Neutrons also are in the nucleus. The middle shell is not a standard term related to the octet rule.
• For question 22: In \(CaCl_2\), \(Ca\) loses two electrons to become \(Ca^{2 +}\) and each \(Cl\) gains one electron to become \(Cl^-\). The Lewis structure should show \(Ca^{2+}\) and two \(Cl^-\) ions. Option D has the correct representation of the ions.

Answer:

1. B. electrons; valence
2. D.