1. Write out the electron configurations for (a) potassium and (b) cobalt. How many unpaired electrons does each possess?
2. Which element has the following electron configuration: 1s^2,2s^2,2p^3?
3. Write out the electron configurations for (a) silicon and (b) lithium. How many unpaired electrons does each posses?
4. Which element has the following electron configuration: 1s^2,2s^2,2p^6,3s^2,3p^3?
5. Write out the electron configurations for (a) iridium and (b) selenium. How many unpaired electrons does each possess
6. Which elements has the following electrons configuration: 1s^2,2s^2,2p^6,3s^2,3p^6,4s^2,3d^1?
7. Write out the electron configuration for (a) bismuth and (b) vanadium. How many unpaired electrons does each possess?
9. Write out the electron configurations for (a) sulfur and (b) mercury. How many unpaired electrons does each possess?
10 Write out the electron configuration chart through the fifth level.