metals, non metals and metalloids questions

or In metals, either the conduction band is partially filled or overlaps with valence band. There is no forbidden energy gap in between. Even if a small electric field is applied, free electrons start moving in a direction opposite to field and hence a good conductor of electrici..

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Acetic acid reacts with strongly electropositive metals like sodium and zinc to give the respective acetate and liberate hydrogen..

They are generally solids with characteristics such as hardness, malleability, ductility high tensile strength, lustre and ability to conduct heat and electricity. For example: Copper, iron, zinc e..

The metals so extracted are further refined by suitable methods. The electrolytic method is the most suitable method for refining the non-ferrous metals. The metals produced by any method given above are not very pure. These need further refining. This can be..

The metals so extracted are further refined by suitable methods. The electrolytic method is the most suitable method for refining the non-ferrous metals. The metals produced by any method given above are not very pure. These need further refinin..

As hydrogen behaves like a metal, it usually does not combine with metals. However, highly electro-positive metals like potassium, sodium and calcium combine with hydrogen, to form their respective hydrides. In these hydrides, hydrogen has a negative valency (H - 1 )..

fig 1.22 - Overlapping of s and p bands in group II elements Metals are extreme examples of delocalized electrons. In a metallic crystal the electrons are free to move throughout the crystal. However, the metal ions are fixed in position and can only vibrate. When a ..

. Lead corrodes to a white lead oxide or carbonate and copper corrodes to form a basic green carbonate (combination of the hydroxide Cu(OH) 2 and carbonate CuCO 3 ). In the past both metals have been used for piping but as lead is considered too toxic copper is usually used. Non..

Sl.No Non-metal Physical state Symbol 1. Hydrogen Gas H 2. Nitrogen Gas N 3. Oxygen Gas O 4. Flourine Gas F 5. Chlorine Gas Cl 6. Bromine Liquid Br 7. Astatine Solid At 8. Carbon Solid C 9. Iodine Solid I 10. Sulphur Soli..