Electron Configuraton Transition Metals Special stability one e in each of five 3d orbitals and again two e in each of five 3d orbitals 3d Ca 4s v Sc v Ti v V v Cr Mn v Fe v v Co v v v Ni v v v v Cu v v v v v Zn v v v v v v ConcepTest Which transition metal has the electron configuration Ar 3d5 A Mn B Mn2 C Cr D Cr2 E V2 F none of these Cations electrons removed from highest n within a shell e of max l removed Na 1s22s22p63s1 Na 1s22s22p6 Ge Ar 3d104s24p2 Ge 2 Ar 3d104s2 Transition metals ns electrons lost before n 1 d electrons Ti Ar 3d24s2 Ti2 Ar 3d2 Fe Ar 3d64s2 Fe2 Ar 3d6 Atomic Properties Atomic Size Periodic properties related to valence shell electron configurations o Units pm 10 12 m ConcepTest Which pair of atoms is NOT listed in order of INCREASING atomic radius A K Rb B Mg Ca C O S D Sr In E Sr Rb F these are all listed in order of increasing radius ConcepTest Which pair of atoms would be expected to have the longest interatomic distance in a molecule having such a bond A C C 77 B C N 74 C C O 71 5 D C S 90 5 E C Br 95 5 ConcepTest Which pair of atoms in a single period would be expected to have the smallest and the largest ionization energies respecitively A Li Na B Li Ne C Ne Li D Li Be E F Ne Ionization Energy Atom g Atom g eTells you how easy it is to make a cation out of something 1st IE atom g atom g e2nd IE atom g atom g 2e3rd IE atom g atom g 3eConcepTest Which pair of atoms in a single period would be expected to have the smallest and the largest electron attachment electron attachment enthalpies respectively A Li Na B Li F C F Li D Li Be Electron attachment elntahlpy atom g e atom g E O F