Alkali Metals

A brief document of Alkali metals in the periodic table

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  • Created by: Charbs
  • Created on: 29-04-10 10:36
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Alkali Metals
The alkali metals, found in group 1 of the periodic table (formerly known as group IA),
are very reactive metals that do not occur freely in nature. These metals have only
one electron in their outer shell. Therefore, they are ready to lose that one electron
in ionic bonding with other elements. As with all metals, the alkali metals are
malleable, ductile, and are good conductors of heat and electricity. The alkali metals
are softer than most other metals. Cesium and francium are the most reactive
elements in this group. Alkali metals can explode if they are exposed to water.
Standard
Alkali Melting Boiling Density Electronegativity
Atomic Weight
metal Point (K) Point (K) (gcm-3) (Pauling)
(u)
Lithium 6.941 453 1615 0.534 0.98
Sodium 22.990 370 1156 0.968 0.93
Potassium 39.098 336 1032 0.89 0.82
Rubidium 85.468 312 961 1.532 0.82
Caesium 132.905 301 944 1.93 0.79
Francium (223) 295 950 1.87 0.70
Element No. of electrons/shell
1 Hydrogen 1
3 Lithium 2, 1
11 Sodium 2, 8, 1
19 Potassium 2, 8, 8, 1
37 Rubidium 2, 8, 18, 8, 1
55 Caesium 2, 8, 18, 18, 8, 1
87 Francium 2, 8, 18, 32, 18, 8, 1

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