Question

ordering 1 point predict the order of decreasing radius for germanium, cesium, bromine, potassium. largest atomic radius 1 cesium 2 potassium 3 germanium 4 bromine smallest atomic radius

Explanation:

Step1: Recall atomic radius trends

Atomic radius increases down a group (due to more electron shells) and decreases across a period (due to increased nuclear charge pulling electrons closer).

Step2: Identify positions of elements

• Cesium (Cs) and Potassium (K) are in Group 1 (alkali metals). Cs is below K, so \( \text{Cs} > \text{K} \) in radius.
• Germanium (Ge) and Bromine (Br) are in Period 4. Ge is to the left of Br, so \( \text{Ge} > \text{Br} \) in radius.
• Compare Group 1 (K, Cs) with Period 4 (Ge, Br). Group 1 elements have more electron shells (K and Cs have 4 and 6 shells, Ge and Br have 4 shells). So K (4 shells) > Ge (4 shells), Cs (6 shells) > K (4 shells).

Step3: Order from largest to smallest

Combining trends: \( \text{Cesium} > \text{Potassium} > \text{Germanium} > \text{Bromine} \).

Answer:

1. cesium
2. potassium
3. germanium
4. bromine