Metals and Nonmetals | Prep.1 | Unit 1 - Lesson 1 | Science

شرح ساينس الصف الأول الاعدادي لغات - الفصل الدراسي الثاني شرح ساينس الاول الاعدادي - ترم تاني لينك تحميل الملزمة https://drive.google.com/file/d/13VMK... لينك تليجرام https://t.me/mrahmedelbashagroup In This Part : By the end of this unit, the student should be able to: 1. Explain the metallic bond. 2. Differentiate between metals and nonmetals. 3. Describe bronze alloy. 4. Differentiate between the properties of each of the acids and the alkalis. 5. Recognize pH and its relation with acidity and basicity. 6. Describe the properties of the salts. 7. Distinguish between acids, alkalis and salt solutions by using chemical indicators. 8. Recognize a profile of the scientist Soren Sorensen. Metallic Bond The crystal lattice of copper metal Metallic bond The attraction force between the positive metal ions and the negative valence electron cloud which surrounds them. Some physical properties of metals are attributed to (due to) the fact that their atoms bind together through metallic bonds. The metallic bond is responsible for the metals hardness and their high melting points. As the number of valence electrons in the metal atom increases, the strength of its metallic bond also increases, consequently, the metal is harder and its melting point is higher بالتوفيق مستر احمد الباشا