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प्रश्न
Give two examples of Non-metals.
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उत्तर
Examples of Non-metals: Carbon are sulphur, oxygen.
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संबंधित प्रश्न
Define: Compounds
Find the atomicity of the Following molecule:
Acetic Acid
Complete the statement given below by filling in the blank with the correct word.
Element ______ has the symbol derived from its Latin name ‘Argentum’
Represent with the help of a simple chart how matter is classified into pure or impure substances & further into elements, compounds & mixtures, with elements further segmented.
Match the separation of components in List I with the most appropriate process in List II.
| List I | List II |
| 1. Naphthalene from naphthalene & sodium chloride. | A: Separating funnel |
| 2. Cream from milk. | B: Sublimation |
| 3. Kerosene oil from kerosene oil & water. | C: Boiling |
| 4. Lead nitrate from an aqueous solution of lead nitrate. | D: Centrifugation |
| 5. Ammonia from an aqueous solution of ammonia. | E: Distillation |
Elements are made up of______ kinds of atoms.
State true of false. If false, give the correct statement.
Two different elements may have similar atoms.
Differentiate between elements and compounds.
Assertion: Air is a mixture of elements only.
Reason: Only nitrogen, oxygen and neon gases exist in air.
Reason out
Elements are called semimetals.
