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Date: 16-1-2018
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Date: 10-3-2019
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Date: 10-12-2018
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Beryllium
Beryllium is an element found in nature and is combined with other elements in minerals, including beryl and chrysoberyl. In its purest form, beryllium is a steel-gray and lightweight alkaline earth metal.
Due to its physical properties, beryllium is useful as a hardening agent in alloys, making aerospace material, and used as a filter for radiation. Beryllium is not used for commercial use due to the harmful effects when it is inhaled through dust particles, causing berylliosis (a corrosive disease typically in the lungs). Beryllium is a rare element on Earth and in the universe and is not found to be necessary or helpful for plants or animals.
General Properties of Beryllium
Symbol | Be |
Color | Steel Gray |
Atomic Number | 4 |
Category | Alkali Earth Metal |
Atomic Weight | 9.012182 |
Group/Period | 2/2 |
Electron Configuration | 1s2 2s2 |
Valence Electrons | 2 |
Phase (room temperature) | Solid |
Melting Point | 1560 K, 1287°C |
Boiling Point | 2742 K, 2469 °C |
Atomic Radius | 105 pm |
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"عادة ليلية" قد تكون المفتاح للوقاية من الخرف
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ممتص الصدمات: طريقة عمله وأهميته وأبرز علامات تلفه
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ندوات وأنشطة قرآنية مختلفة يقيمها المجمَع العلمي في محافظتي النجف وكربلاء
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