What does this mean to you? WARM UP “Of all the things you wear, your expression is the most important.” – Janet Lane What does this mean to you? Do you agree with this?

The Big Bang Theory

Periodic Table and Electron Configurations

Sub-Shell Blocks s-block, main group on left p-block, main group on right d-block, transitions in middle f-block, lanthanides and actinides

Sub-Shell Blocks Block element is in represents the last subshell e- will be put in Ex: Mn = d Pb = p U = f

Groups and e- Count across to find how many e- are in subshell Ex: Mn = 5 Pb = 2 U = 4

Periods and Shells Each period represents one shell Mn= 4 shells Pb= 6 shells U= 7 shells

Periods and Shells s and p blocks are true shell/period matches (Si is 3p) d-blocks are shell 1 less than period (Os is 5d) f-blocks are in shell 2 less than period (Gd is 4f)

Core and Valence e- Core e- are in the inner rings Valence e- are in the outermost shell Important! Core e- are in the inner rings Filler

Noble Gas Notation Shows e- in last period (valence) – the important ones Inner e- configuration shortened to noble gas (less important) 1s22s22p6 = Ne Al = [Ne] 3s23p1

Noble Gas Notation Ex. – Fr and Ge Steps Write preceding noble gas Determine valence shell Identify sub-shell block(s) Count boxes

WRAP UP Describe the location of each subshell block in 3 words or less. s: p: d: f:

WARM UP Identify the subshell block for: Ca, W, and P Identify the valence shell for: Mg, U, and Xe Identify the # of e- in the p subshell for: C, Pb, Ge, and In

WRAP UP Identify the subshell block for: C and U Identify the valence shell for: Cu, Pb, and K Identify the # of e- in the p subshell for: P, Xe, and Br