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The. Periodic. Table. 1 H 1.008. ALKALI. 3 Li 6.941. METALS. 11 Na 22.99. 19 K 39.10. Group IA Characteristics: The most chemically reactive metals, with the exception of Hydrogen, losing their one valence electron to non-metals
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The Periodic Table
1 H 1.008 ALKALI 3 Li 6.941 METALS 11 Na 22.99 19 K 39.10 • Group IA Characteristics: • The most chemically reactive metals, with the exception of Hydrogen, losing their one valence electron to non-metals • Going down the group, the atomic radius and density of the elements increase 37 Rb 85.47 55 Cs 132.9 87 Fr (223)
Group IIA Characteristics: • These elements are also very reactive, losing their two valence electrons to non-metals 4 Be 9012 12 Mg 24.31 20 Ca 40.08 38 Sr 87.62 Alkaline 56 Ba 137.3 Earth Metals 88 Ra 226
1 H 1.007 9 F 18.9984 17 Cl 35.453 35 Br 79.909 53 I 126.904 85 At (210) Halogens • Group 7A Characteristics: • These elements all form diatomic molecules. • With the exception of At, they all react with metals to form salts containing ions with a 1- charge.
2 He 4.0026 10 Ne 20.179 18 Ar 39.498 36 Kr 83.80 54 Xe 131.30 86 Rn (222) • Group 8A Characteristics: • These elements exist under normal conditions as single-atom gases • Have little chemical reactivity Noble Gases
13 Al 26.9815 31 Ga 69.72 32 Ge 72.59 50 Sn 118.69 82 Pb 207.19 49 In 114.82 51 Sb 121.75 81 Tl 204.37 83 Bi 208.98 84 Po (210) Metals • Characteristics: • These have physical properties such as conduction of heat & electricity, malleability, ductility, and a lustrous appearance • They tend to loose elections to form positive ions.
Nonmetals 5 B 10.811 6 C 12.011 14 Si 28.086 7 N 14.0067 15 P 30.9738 33 As 74.9216 8 O 15.999 16 S 32.064 34 Se 78.96 52 Te 127.6 • Characteristics: • These are found in the upper right-hand corner of the table. • Lack the physical properties to deem them metals. • They tend to gain electrons in reactions with metals.
21 Sc 44.96 22 Ti 47.88 23 V 50.94 24 Cr 52.00 25 Mn 54.94 26 Fe 55.85 27 Co 58.93 28 Ni 58.69 29 Cu 63.55 30 Zn 65.38 39 Y 88.91 40 Zr 91.22 41 Nb 92.91 42 Mo 95.94 43 Tc (98) 44 Ru 101.1 45 Rh 102.9 46 Pd 106.4 47 Ag 107.9 48 Cd 112.4 57 La 138.9 72 Hf 178.9 73 Ta 180.9 74 W 183.9 75 Re 186.2 76 Os 190.2 77 Ir 192.2 78 Pt 195.1 79 Au 197.0 80 Hg 200.6 89 Ac (227) 104 Unq 105 Unp 106 Unh 107 Uns 108 Uno 109 Une 110 Uun 111 Uuu TRANSITION METALS Characteristics: They show great similarities within a given period and group The last electrons are added to the d orbital
Lanthanum Series 58 Ce 140.12 59 Pr 140.9 60 Nd 144.2 61 Pm (147) 62 Sm 150.35 63 Eu 151.96 64 Gd 157.25 65 Tb 158.92 66 Dy 162.5 67 Ho 164.93 68 Er 167.26 69 Tm 168.93 70 Yb 173.04 71 Lu 174.97 • Characteristics: • Electrons fill the 4f orbital • These elements decrease in size, going from left to right
90 Th 232.03 91 Pa (231) 92 U 238.0 93 Np (237) 94 Pu (234) 95 Am (243) 96 Cm (247) 97 Bk (247) 98 Cf (252) 99 Es (254) 100 Fm (257) 101 Md (257) 102 No (255) 103 Lr (256) Actinium Series • Characteristics: • Members of the transitions metals • Electrons fill the 5f orbital