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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
Select elements and compounds from the following list: Iron, plaster of paris, chalk, common salt, copper, aluminium, calcium oxide, cane sugar, carbon, silica, sodium sulphate, uranium, potassium carbonate, silver, carbon dioxide.
The atoms of which of the following pair of elements are most likely to exist in free state ?
What do the following symbol stand for?
H
State the type of element for the following:
Neon
Give the symbol of the following element:
Sulphite
Write the radical of the following valency:
magnesium
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Copper
write symbol with the variable valency
Certain metal exhibit variable valencies which include valencies: 1+, 2+, 3+, and 4+.
State the variable valency of the following metal.
Iron
write symbol with the variable valency
Which of the following symbols of elements are incorrect? Give their correct symbols
- Cobalt CO
- Carbon c
- Aluminium AL
- Helium He
- Sodium So
The name copper was taken from ______.
