Questions:
Write the complete electron configuration for the following:
1. Sodium (Na)
2. Iron (Fe)
3. Phosphorus (P)
Write the noble gas electron configuration for the following:
1. Lead (Pb)
2. Silver (Ag)
3. Radium (Ra)
Identify the following elements:
1. 1s2 2s2 2p6 3s2
2. 1s2 2s2 2p6 3s2 3p6 4s2 3d5
3. [Rn] 7s1