Question

1. what period are the following elements in? a. he b. ge c. rb d. i 4. what group are the following elements? a. sulfur b. ca c. iodine d. fe

Explanation:

Helium (He) is in period 1, Germanium (Ge) is in period 4, Rubidium (Rb) is in period 5, Iodine (I) is in period 5. Sulfur (S) is in group 16, Calcium (Ca) is in group 2, Iron (Fe) is in group 8.

Answer:

1. a. He - Period 1; b. Ge - Period 4; c. Rb - Period 5; d. I - Period 5
2. a. Sulfur - Group 16; b. Ca - Group 2; c. Iodine - Group 17; d. Fe - Group 8