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Date: 4-12-2018
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Date: 1-2-2018
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Lithium is the lightest of all metals and is named from the Greek work for stone (lithos). It is the first member of the Alkali Metal family. It is less dense than water (with which it reacts) and forms a black oxide in contact with air.
Atomic Number | 3 |
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Atomic Mass | 6.941 g/mol |
Atomic Radius | 152 pm |
Density | 0.534 g/cm3 |
Color | light silver |
Melting point | 453.69 K |
Boiling point | 1615 K |
Heat of fusion | 3.00 kJ/mol |
Heat of vaporization | 147.1 kJ/mol |
Specific heat capacity | 24.860 kJ/mol |
First ionization energy | 520.2 kJ/mol |
Oxidation states | +1, -1 |
Electronegativity | 0.98 |
Crystal structure | body-centered cubic |
Magnetism | paramagnetic |
2 stable isotopes | 6Li (7.5%) and 7Li (92.5%) |
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الصين.. طريقة لمنع تطور قصر النظر لدى تلاميذ المدارس
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ماذا سيحدث خلال كسوف الشمس يوم السبت؟
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قسم الشؤون الدينية يختتم محاضراته الرمضانية في صحن مرقد أبي الفضل العباس (عليه السلام)
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