Name  Lewis Structure  Kernel electrons  Valence electrons 
Sodium  Na^{.}  1s^{2} 2s^{2} 2p^{6}  3s^{1} 
Phosphorus  1s^{2} 2s^{2} 2p^{6}  3s^{2} 3p^{3}  
Bromine  1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} 3d^{10} (≠ [Ar] = 1s^{2} 2s^{2} 2p^{6} 3s^{2} 3p^{6} ) 
4s^{2}4p^{5} 

Trigonal planar with angles of 120°
Tetrahedral with angles of 109.5°
CO_{2} linear molecular geometry
Trigonal planar molecular geometry (formaldehyde, CH_{2}O)
Tetrahedral molecular geometry (methane, CH_{4})
Trigonal pyramidal molecular geometry (ammonia, NH_{3}) [model]
rotated to view molecule from below
Bent molecular geometry (water, H_{2}O)
© R A Paselk
Last modified 7 October 2008