White the names for the following compounds: \( 7.1 \mathrm{Ca} \mathrm{N}_{2} \) \( 7.3 \mathrm{Ca}\left(\mathrm{NO}_{2}\right)_{2} \) 7.3

Sure, let's name each of the given compounds based on their chemical formulas. ### 7.1 \( \mathrm{CaN}_2 \) **Name:** **Calcium Nitride** **Explanation:** - **Calcium (Ca):** This is the metal in the compound with a **+2 oxidation state**. - **Nitride (N\(_2\)):** The nitride ion typically has a **-3 charge**. To balance the charges between calcium and nitride: - **3 calcium ions (3 × +2 = +6)** - **2 nitride ions (2 × -3 = -6)** Therefore, the correct formula is **Ca\(_3\)N\(_2\)**, and the name is **Calcium Nitride**. ### 7.3 \( \mathrm{Ca(NO}_2\mathrm{)}_2 \) **Name:** **Calcium Nitrite** **Explanation:** - **Calcium (Ca):** Again, this metal has a **+2 oxidation state**. - **Nitrite (NO\(_2\))**: This is a polyatomic ion with a **-1 charge**. Since there are two nitrite ions to balance the +2 charge of calcium: - **1 calcium ion (1 × +2 = +2)** - **2 nitrite ions (2 × -1 = -2)** Thus, the formula **Ca(NO\(_2\))\(_2\)** correctly represents the compound, and its name is **Calcium Nitrite**. --- **Summary:** 1. **Ca\(_3\)N\(_2\)** – **Calcium Nitride** 2. **Ca(NO\(_2\))\(_2\)** – **Calcium Nitrite**