Page 80 - Electrical Properties of Materials

Number of electrons
Element
Atomic
Number of electrons
4d symbol number 7p 7s 6f 6d 6p 6s 5g 5f 5d 5p 6s 5g 5f 5d 5p 5s 4f – – – – – 2 – – 3 6 Ta 73 – – – – – 1 – – 2 4 6 W 74 – – – – – 2 – – 2 5 6 Re 75 2 – 1 2 6 6 Os 76 2 – 2 0 9 6 Ir 77
4p 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6 6
4s 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2 2
Element symbol Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe Cs Ba La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb Lu Hf
Atomic number 4f 4d 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 – –
The electronic configurations of the elements Number of electrons 4p 4s 3d 3p 3s 2p 2s 1 2 1 2 2 2 3 2 4 2 5 2 6 2 1 6 2 2 6 2 1 2 6 2 2 2 6 2 3 2 6 2 4 2 6 2 5 2 6 2 6 2 6 2 1 – 6 2 6 2 2 – 6 2 6 2

Table 4.1 Element Atomic symbol number 1s 1 H 1 2 He 2 2 Li 3 2 Be 4 2 B 5 2 C 6 2 N 7 2 O 8 2 F 9 2 Ne 10 2 Na 11 2 Mg 12 2 Al 13 2 Si 14 2 P 15 2 S 16 2 Cl 17 2 A 18 2 K 19 2 Ca 20 2 Sc 21 2