Question

on the basis of their positions in the periodic table, write the chemical symbol for the atom with the largest atomic radius in each of the following: part 1 of 5 k, li, cs part 2 of 5 ca, sr, mg part 3 of 5 sb, bi, n part 4 of 5 cl, br, f

Explanation:

Step1: Recall atomic - radius trend

Atomic radius increases down a group in the periodic table.

Step2: Analyze Part 1 (K, Li, Cs)

K, Li, Cs are in Group 1. Cs is the lowest - placed, so it has the largest radius.

Step3: Analyze Part 2 (Ca, Sr, Mg)

Ca, Sr, Mg are in Group 2. Sr is lower than Ca and Mg, so it has the largest radius.

Step4: Analyze Part 3 (Sb, Bi, N)

Sb, Bi, N are in Group 15. Bi is the lowest - placed, so it has the largest radius.

Step5: Analyze Part 4 (Cl, Br, F)

Cl, Br, F are in Group 17. Br is lower than Cl and F, so it has the largest radius.

Answer:

Part 1: Cs
Part 2: Sr
Part 3: Bi
Part 4: Br