Periodic Table Groups
Alkali Metals (Group 1)
3 Li — Lithium—[He]2s¹
11 Na — Sodium—[Ne]3s¹
19 K — Potassium—[Ar]4s¹
37 Rb — Rubidium—[Kr]5s¹
55 Cs — Cesium—[Xe]6s¹
87 Fr — Francium—[Rn]7s¹
Alkaline Earth (Group 2)
4 Be — Beryllium—[He]2s²
12 Mg — Magnesium—[Ne]3s²
20 Ca — Calcium—[Ar]4s²
38 Sr — Strontium—[Kr]5s²
56 Ba — Barium—[Xe]6s²
88 Ra — Radium—[Rn]7s²
Transition Metals (Period 4)
21 Sc — Scandium—
22 Ti — Titanium—
23 V — Vanadium—
24 Cr — Chromium—
25 Mn — Manganese—
26 Fe — Iron—
27 Co — Cobalt—
28 Ni — Nickel—
29 Cu — Copper—
30 Zn — Zinc—
Transition Metals (Period 5)
39 Y — Yttrium—
40 Zr — Zirconium—
41 Nb — Niobium—
42 Mo — Molybdenum—
44 Ru — Ruthenium—
45 Rh — Rhodium—
46 Pd — Palladium—
47 Ag — Silver—
48 Cd — Cadmium—
Transition Metals (Period 6)
72 Hf — Hafnium—
73 Ta — Tantalum—
74 W — Tungsten—
75 Re — Rhenium—
76 Os — Osmium—
77 Ir — Iridium—
78 Pt — Platinum—
79 Au — Gold—
80 Hg — Mercury—
Boron Group (13) & Carbon Group (14)
5 B — Boron—Metalloid
13 Al — Aluminum—Metal
31 Ga — Gallium—Metal
6 C — Carbon—Nonmetal
14 Si — Silicon—Metalloid
32 Ge — Germanium—Metalloid
50 Sn — Tin—Metal
82 Pb — Lead—Metal
Nitrogen Group (15) & Oxygen Group (16)
7 N — Nitrogen—Nonmetal
15 P — Phosphorus—Nonmetal
33 As — Arsenic—Metalloid
8 O — Oxygen—Nonmetal
16 S — Sulfur—Nonmetal
34 Se — Selenium—Nonmetal
52 Te — Tellurium—Metalloid
Halogens (Group 17)
9 F — Fluorine—Most electronegative
17 Cl — Chlorine—Gas, yellow-green
35 Br — Bromine—Liquid at room temp
53 I — Iodine—Solid, purple vapor
85 At — Astatine—Radioactive
Noble Gases (Group 18)
2 He — Helium—1s²
10 Ne — Neon—[He]2s²2p⁶
18 Ar — Argon—[Ne]3s²3p⁶
36 Kr — Krypton—[Ar]3d¹⁰4s²4p⁶
54 Xe — Xenon—[Kr]4d¹⁰5s²5p⁶
86 Rn — Radon—Radioactive
Hydrogen & Key Elements
1 H — Hydrogen—Most abundant element
2 He — Helium—2nd most abundant
6 C — Carbon—Basis of organic chem
8 O — Oxygen—21% of atmosphere
26 Fe — Iron—Most used metal
29 Cu — Copper—Excellent conductor
47 Ag — Silver—Best conductor
79 Au — Gold—Noble metal
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