|
Atomic Number
|
Electron configuration
|
Oxidation numbers
|
Atomic Weight | |
| Helium (He) | 2 | 1s2 | +1, - 1 | 4.003 |
| Neon (Ne) | 10 | [He] 2s22p6 | 20.183 | |
| Argon (Ar) | 18 | [Ne] 3s23p6 | 39.948 | |
| Krypton (Kr) | 36 | [Ar] 3d104S24p6 | +2, +4 | 83.80 |
| Xenon (Xe) | 54 | [Kr] 4d105s25p6 | +2, +4, +6, +8 | 131.30 |
| Radon (Rn) | 86 | [Xe] 4f145d106s26p6 | +2 | 222* |
Xenon.
Na4XeO6 = sodium perxenate
|
Atomic Number
|
Electron configuration
|
Oxidation numbers
|
Atomic Weight | |
| Actinium (Ac) | 89 | [Rn] 6d7s2 | +3 | 227* |
| Thorium (Th) | 90 | [Rn] 6d27s2 | +2, +3, +4 | 232.04 |
| Protactinium (Pa) | 91 | [Rn] 5f2 6d 7s2 | +3, +4, +5 | 231* |
| Uranium (U) | 92 | [Rn] 5f3 6d 7s2 | +3, +4, +5, +6 | 238.03 |
| Neptunium (Np) | 93 | [Rn] 5f4 6d 7s2 | +3, +4, +5, +6,+7 | 237* |
| Plutonium (Pu) | 94 | [Rn] 5f6 7s2 | +3, +4, +5, +6,+7 | 244* |
| Americium (Am) | 95 | [Rn] 5f7 7s2 | +3, +4, +5, +6 | 243* |
| Curium (Cm) | 96 | [Rn] 5f7 6d 7s2 | +3, +4 | 247* |
| Berkelium (Bk) | 97 | [Rn] 5f9 7s2 | +3, +4 | 247* |
| Californium (Cf) | 98 | [Rn] 5f10 7s2 | +3, +4 | 251* |
| Einstenium (Es) | 99 | [Rn] 5f11 7s2 | +3 | 252* |
| Fermium (Fm) | 100 | [Rn] 5f12 7s2 | +3 | 257* |
| Mendelevium (Md) | 101 | [Rn] 5f13 7s2 | +3 | 258* |
| Nobelium (No) | 102 | [Rn] 5f14 7s2 | +2, +3 | 259* |
| Lawrencium (Lw) | 103 | [Rn] 5f14 6d 7s2 | +3 | 260* |
Actinides elements together with lanthanides elements compose the group of rare earth elements.
Transition metals belong to groups 3 (IIIA) through 12 (IIB) of the periodic table. They have properties similar to metals (ductiles and malleables, and conduct electricity and heat). Transition metals, when combine with other elements, use electrons present in more than one shell. This is the reason for they often exhibit several common oxidation states. Iron, cobalt, and nickel are the only elements known to produce a magnetic field.
The 38 transition elements are
Scandium, Titanium, Vanadium, Chromium, Manganese, Iron, Cobalt, Nickel, Copper, Zinc, Yttrium, Zirconium, Niobium, Molybdenum, Technetium, Ruthenium, Rhodium, Palladium, Silver, Cadmium, Hafnium, Tantalum, Tungsten, Rhenium, Osmium, Iridium, Platinum, Gold, Mercury, Rutherfordium, Dubnium, Seaborgium, Bohrium, Hassium, Meitnerium, Ununnilium, Unununium, Ununbium