Điền vào chỗ trống:
1,H 2,He 3,Li 4,,Be 5,B 6,... 7,N 8,O 9,F 10,... 11,Na 12,Mg 13,Al 14,Si 15,P 16,S 17,... 18,Ar 19,K 20,Ca 21,Sc 22,Ti 23,V 24,Cr 25,Mn 26... 27,Co 28,Ni 29,Cu 30,Zn 31,Ga 32,Ge 33,As 34,Se 35,Br 36,Kr 37,Rb 38,Sr 39,Y 40,... 41,Nb 42,Mo 43,Tc 44,Ru 45,Rh 46,Pd 47,Ag 48,Cd 49,In 50,Sn 51,Sb 52,... 53,I 54,Xe 55,Cs 56,Ba 57,La 58,Ce 59,Pr 60,Nd 61,Pm 62,Sm 63,Eu 64,Gd 65,... 66,... 67,Ho 68,Er 69,Tm 70,Yb 71,Lu 72,Hf 73,Ta 74,W 75,Re 76,Os 77,... 78,Pt 79,Au 80 Hg 81,Tl 82,Pb 83,Bi 84,Po 85,,At 86,Rn 87,Fr 88,Ra 89,Ac 90,... 91,... 92,U 93,Np 94,Pu 95,Am 96,Cm 97,Bk 98,Cf 99,Es 100,Fm 101,Md 102,No 103,Lr 104,... 105,Db 106,... 107,Bh 108,Hs 109,Mt 110,Ds 111,Rg 112,... 113,Nh 114,Fl 115,... 116,Lv 117,Ts 118,Og