Read More
Date: 26-11-2018
1154
Date: 30-10-2018
933
Date: 14-4-2016
1443
|
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 |
---|---|
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%) |
|
|
دراسة يابانية لتقليل مخاطر أمراض المواليد منخفضي الوزن
|
|
|
|
|
اكتشاف أكبر مرجان في العالم قبالة سواحل جزر سليمان
|
|
|
|
|
اتحاد كليات الطب الملكية البريطانية يشيد بالمستوى العلمي لطلبة جامعة العميد وبيئتها التعليمية
|
|
|