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प्रश्न
Elements are mainly classified into metals and non-metals. State six properties of metals which differ from non-metals.
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उत्तर
| Properties | Metals | Non-metals |
| 1. State | Metals are generally solids at room temperature. | Non-metals are gases, liquids, soft solids at room temperature. |
| 2. Lustrous | Metals have lustre i.e. shine. | Non-metals do not have lustre i.e. do not shine. |
| 3. Malleability | Metals are malleable i.e. can be beaten into sheets. | Non-metals are non-malleable i.e. cannot be beaten into sheets. |
| 4. Ductility | Metals are ductile i.e. can be drawn into wires. | Non-metals are non-ductile i.e. cannot be drawn into wires. |
| 5. Conductivity | Metals are good conductors of heat and electricity. | Non-metal are poor conductors of heat and electricity. |
| 6. Melting and Boiling point | Metals have high melting and boiling points. | Non-metals have low melting and boiling points. |
| 7. Density | Metals have high density. | Non-metals have low density. |
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संबंधित प्रश्न
Give the symbols and valencies of following radicals:
(a) Hydroxide (b) Chloride
(c) Carbonate (d) ammonium
(e) Nitrate
Which particular atom of the above element is used for this purpose ?
The atoms of which of the following pair of elements are most likely to exist in free state ?
How are the elements with variable valency named? Explain with an example.
State the type of element for the following:
Phosphorus
Give the symbol of the following element:
Carbonate
Write the chemical formula of the following:
zinc oxide
Give the formula of the following gas:
Nitric oxide
State whether the following ion or radical given below of a non-metallic element exhibits valency: 1–, 2– or 3–. (write the ion or radical with the correct valency).
Nitride
Fill in the blank with the correct word from the options given below:
A symbol represents a short form of a / an ________.
