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प्रश्न
Give the symbols of: Carbon, calcium, copper, chlorine, cobalt, argon.
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उत्तर
Carbon is C, Chlorine is Cl, Calcium is Ca, Cobalt is Co Copper is Cu, Argon is Ar.
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संबंधित प्रश्न
Fill in the blank
A pure substance has definite.................. and constant ..............
Name: a Metal Which is brittle
Name: Three different forms of carbon
Answer the following question:
Give the advantages of using symbols instead of names of elements or compounds.
Fill in the blank
A liquid non-metal is _______.
Select the correct answer from the choice given below.
A group of atoms of elements
‘An atom is the basic unit of an element’. Draw a diagram of an atom – divisible as seen today.
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 |
Select the correct answer from the choice given below to complete the sentence :
An example of a monoatomic molecule is ___________.
Give an account of elements known to us.
