Web Elements Web Page http://www.webelements.com/
Groups[1] 1[2]
2[3]
3[4] 4 5 6 7 8 9 10 11 12 13[5] 14[6] 15[7] 16[8] 17[9] 18[10]
Periods[11] 1[12] [13] 2[14]
1 H [15] Metal   C Solid     He
1.00794 [16] Semimetal Br Liquid     4.0026
3[17] 4[18] Nonmetal H Gas     5[19] 6[20] 7[21] 8[22] 9[23] 10[24]
2 Li Be Inert Gas Tc Not found in nature B C N O F Ne
6.941 9.01218
10.81 12.011 14.007 15.999 18.998 20.179
11[25] 12[26] 13[27] 14[28] 15[29] 16[30] 17[31] 18[32]
3 Na Mg Al Si P S Cl Ar
24.305 990 26.981 28.086 30.974 32.06 35.453 39.948
19[33] 20[34] 21[35] 22[36] 23[37] 24[38] 25[39] 26[40] 27[41] 28[42] 29[43] 30[44] 31[45] 32[46] 33[47] 34[48] 35[49] 36[50]
4 K Ca Sc Ti V Cr Mn Fe Co Ni Cu Zn Ga Ge As Se Br Kr
39.098 40.08 44.956 47.9 50.941 51.996 54.938 55.847 58.933 58.71 63.546 65.38 69.72 72.59 74.922 78.96 79.904 83.80
37[51] 38[52] 39[53] 40[54] 41[55] 42[56] 43[57] 44[58] 45[59] 46[60] 47[61] 48[62] 49[63] 50[64] 51[65] 52[66] 53[67] 54[68]
5 Rb Sr Y Zr Nb Mo Tc Ru Rh Pd Ag Cd In Sn Sb Te I Xe
85.468 87.62 88.906 91.22 92.906 95.94 (98) 101.07 102.91 106.4 107.87 112.41 114.82 118.69 121.75 127.60 126.90 131.30
55[69] 56[70] 71[71] 72[72] 73[73] 74[74] 75[75] 76[76] 77[77] 78[78] 79[79] 80[80] 81[81] 82[82] 83[83] 84[84] 85[85] 86[86]
6 Cs Ba Lu Hf Ta W Re Os Ir Pt Au Hg Tl Pb Bi Po At Rn
132.91 137.33 174.97 178.49 180.95 183.85 186.21 190.20 192.22 195.09 196.97 200.59 204.37 207.20 208.98 (209) (210) (222)
87[87] 88[88] 103[89] 104[90] 105[91] 106[92] 107[93] 108[94] 109[95] 110[96] 111[97] 112[98] Zigzag line[99]
7 Fr Ra Lr Rf Db Sg Bh Hs Mt Ds Rg Uub
(223) (226) (262) (261) (262) (263) (264) (265) (268) (269) (272) (277)
57[100] 58[101] 59[102] 60[103] 61[104] 62[105] 63[106] 64[107] 65[108] 66[109] 67[110] 68[111] 69[112] 70[113]
Lanthanides La Ce Pr Nd Pm Sm Eu Gd Tb Dy Ho Er Tm Yb
138.91 140.12 140.91 144.24 (145) 150.4 151.96 157.25 158.93 162.5 164.93 167.26 168.93 173.04
89[114] 90[115] 91[116] 92[117] 93[118] 94[119] 95[120] 96[121] 97[122] 98[123] 99[124] 100[125] 101[126] 102[127]
Actinides Ac Th Pa U Np Pu Am Cm Bk Cf Es Fm Md No
227 232.04 231.04 238.03 (237) (244) (243) (247) (247) (251) (252) (257) (258) (259)
Prentice Hall - California Physical Science Textbook
[1]
A column of elements is called a group or family.  A group consists of elements with similar characteristics.
[2]
Alkaline metals
[3]
Alkaline earth metals
[4]
Groups 3-12 are transition metals
[5]
Boron family
[6]
Carbon family
[7]
Nitrogen family.
[8]
Oxygen family
[9]
The Halogen family
[10]
Noble gases
[11]
A row of elements is called a period.  A period contains a series of different elements.  The period number represents the number of electron clouds in each atom of the element.
[12]
Hydrogen
[13]
Atomic number: the atomic number is the number of protons in an atom's nucleus.
[14]
Helium
[15]
Chemical Symbol
[16]
Atomic Mass: Atomic mass is the average mass of an element's atoms.  Atomic masses in parentheses are those of the most stable isotope.
[17]
Lithium
[18]
Beryllium
[19]
Boron
[20]
Carbon
[21]
Nitrogen
[22]
Oxygen
[23]
Fluorine
[24]
Neon
[25]
Sodium
[26]
Magnesium
[27]
Aluminum
[28]
Silicon
[29]
Phosphorus
[30]
Sulfur
[31]
Chlorine
[32]
Argon
[33]
Potassium
[34]
Calcium
[35]
Scandium
[36]
Titanium
[37]
Vanadium
[38]
Chromium
[39]
Manganese
[40]
Iron
[41]
Cobalt
[42]
Nickel
[43]
Copper
[44]
Zinc
[45]
Gallium
[46]
Germanium
[47]
Arsenic
[48]
Selenium
[49]
Bromine
[50]
Krypton
[51]
Rubidium
[52]
Strontium
[53]
Yttrium
[54]
Zirconium
[55]
Niobium
[56]
Molybdenum
[57]
Technetium
[58]
Ruthnetium
[59]
Rhodium
[60]
Palladium
[61]
Silver
[62]
Cadmium
[63]
Indium
[64]
Tin
[65]
Antimony
[66]
Tellurium
[67]
Iodine
[68]
Xenon
[69]
Cesium
[70]
Barium
[71]
Lutetium
[72]
Hafnium
[73]
Tantalum
[74]
Tungsten
[75]
Rhenium
[76]
Osmium
[77]
Iridium
[78]
Platinum
[79]
Gold
[80]
Mercury
[81]
Thallium
[82]
Lead
[83]
Bismuth
[84]
Polonium
[85]
Astatine
[86]
Radon
[87]
Francium
[88]
Radium
[89]
Lawrencium
[90]
Rutherfordium
[91]
Dubnium
[92]
Seaborgium
[93]
Bohrium
[94]
Hassium

[95]
Meitnerium
[96]
Darstadtium
[97]
Roentgenium
[98]
Ununbium
[99]
The zigzag line reminds you where the metals, nonmetals, and metalloids are.
[100]
Lanthanum
[101]
Cerium
[102]
Praseodymium
[103]
Neodymium
[104]
Promethium
[105]
Samarium
[106]
Europium
[107]
Gadolinium
[108]
Terbium
[109]
Dysprosium
[110]
Holmium
[111]
Erbium
[112]
Thulium
[113]
Ytterbium
[114]
Actinium
[115]
Thorium
[116]
Protactinium
[117]
Uranium
[118]
Neptunium
[119]
Plutonium
[120]
Americium
[121]
Curium
[122]
Berkelium
[123]
Californium
[124]
Einsteinium
[125]
Fermium
[126]
Mendelevium
[127]
Nobelium