Question

cesium and chlorine
express your answer as a chemical formula.
a chemical reaction does not occur for this question.
part b
calcium and nitrogen
express your answer as a chemical formula.
a chemical reaction does not occur for this question.

Explanation:

Step1: Determine ion charges

Cesium (Cs) is in Group 1, so it forms a +1 ion ($Cs^+$), and chlorine (Cl) is in Group 17, so it forms a - 1 ion ($Cl^-$).

Step2: Write chemical formula

To balance the charges, we need one Cs⁺ and one Cl⁻, so the formula is CsCl.

Step3: For calcium and nitrogen

Calcium (Ca) is in Group 2, so it forms a +2 ion ($Ca^{2 + }$), and nitrogen (N) is in Group 15, so it forms a - 3 ion ($N^{3 - }$).

Step4: Find least - common multiple

The least - common multiple of 2 and 3 is 6.

Step5: Determine number of ions

We need 3 $Ca^{2+}$ ions ($3\times2 = 6$) and 2 $N^{3 - }$ ions ($2\times3=6$) to balance the charges.

Step6: Write chemical formula

The formula is $Ca_3N_2$.

Answer:

Part A: CsCl
Part B: $Ca_3N_2$