Chapter 3, Problem 3.25E

1) Choose a period from the Periodic Table. 2) Identify the period by its number and indicate the first atom and the last one, indicating to which group each one corresponds. 3) Write the electronic configuration of each representative element of the chosen period. 4) Determine the valence electrons of each of these elements. 5) Compare the number of valence electrons of the first and last element of the period. 6) Compare the electronic configurations. Point out similarities and differences in a synthesis of what was observed.​

How many unpaired electrons are found in the ground stae electron configuration of silicon (Si)?

What do the electron structures of the alkali metals have in common? The outermost energy level contains two electrons in an S ✓orbital.