Question

10 multiple choice 6 points name the following compound: k₃n potassium nitride potassium (iii) nitride potassium nitrogen potassium (i) nitride 11 multiple choice 6 points choose the correct chemical formula for the following compound: cesium iodide cl csi₂ csi cs₂i 12 multiple choice 6 points choose the correct chemical formula for the following compound: silver chloride agcl agcl₂ ag₂cl we do not know the charge on silver

Explanation:

Question 10

Step1: Analyze potassium's charge

Potassium (\(K\)) is in Group 1 of the periodic table and has a charge of \(+1\). Since there are 3 \(K\) atoms in \(K_3N\), the total positive charge is \(+3\).

Step2: Analyze nitride's charge

Nitride (\(N\)) has a charge of \(-3\).

Step3: Name the compound

For ionic compounds with fixed - charge metals (Group 1 metals like \(K\) have fixed \(+1\) charge), we don't need to use Roman numerals. The name is formed by the metal name (potassium) followed by the non - metal name with the suffix “-ide” (nitride).

Question 11

Step1: Determine cesium's charge

Cesium (\(Cs\)) is in Group 1 of the periodic table, so it has a charge of \(+1\).

Step2: Determine iodide's charge

Iodide (\(I\)) has a charge of \(-1\).

Step3: Write the formula

Using the criss - cross method (the magnitude of the charge of one ion becomes the subscript of the other ion), for \(Cs^{+}\) and \(I^{-}\), the formula is \(CsI\) (since \(1:1\) ratio of charges).

Question 12

Step1: Determine silver's charge

Silver (\(Ag\)) in common ionic compounds (like silver chloride) has a charge of \(+1\).

Step2: Determine chloride's charge

Chloride (\(Cl\)) has a charge of \(-1\).

Step3: Write the formula

Using the criss - cross method (the magnitude of the charge of one ion becomes the subscript of the other ion), for \(Ag^{+}\) and \(Cl^{-}\), the formula is \(AgCl\) (since \(1:1\) ratio of charges).

Answer:

1. potassium nitride
2. \(CsI\)
3. \(AgCl\)