List of Science Major Scientific Instruments and Equipment PDF आज हम आप सभी के लिए विज्ञान के प्रमुख वैज्ञानिक यंत्र व उपकरण और उनके उपयोग की सूची पीडीएफ (List of Science Major Scientific Instruments and Equipment PDF ) लेकर आये है ये Topic PDF सभी Competitive Exams मे पूछे जाने वाले General Science की तैयारी के लिये
List Of Important Metals and Their Ores with Chemical Formulas PDF
List Of Important Metals and Their Ores with Chemical Formulas PDF What is a Metal? Electro positive elements are known as metals. There are 90 metals in modern periodic table.A metal is a material that is typically hard when in the solid state, opaque, shiny, and has good electrical and thermal conductivity. What is a