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प्रश्न
Distinguish between:
Metals - Nonmetals (physical characteristics)
उत्तर
| Metals | Nonmetals | |
| 1. | Metals are generally solids at room temperature. Exception: Mercury is liquid at room temperature. |
Nonmetals are generally gases or solids at room temperature. Exception: Bromine is in liquid state at room temperature. |
| 2. | Metals are hard. Exceptions: Sodium, potassium. |
Nonmetals are generally soft. Exception: Diamond |
| 3. | Metals have high melting and boiling points. Exceptions: Sodium, potassium, mercury, gallium. |
Nonmetals have low melting and boiling points. |
| 4. | Metals have lustre. | Nonmetals have no lustre. Exception: Iodine |
| 5. | Metals are good conductors of heat and electricity. | Nonmetals are bad conductors of heat and electricity. Exception: Graphite is good conductor of electricity. |
| 6. | Most of the metals are sonorous i.e., they produce a sound when stuck on hard surface. | Nonmetals are not sonorous. |
| 7. | Metals are malleable and ductile. | Nonmetals are not malleable and ductile. |
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संबंधित प्रश्न
Fill in the blanks:
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Name one non-metal which is stored under water.
Name the non-metal which is used to make electrodes of dry cells.
Name one property which is characteristic of non-metals.
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Name a metal used as a thermometric liquid
Tick (√) the most appropriate answer.
Copper metal is used in :
Tick (√) the most appropriate answer.
Sodium amalgam is prepared by dissolving sodium in :
State the composition and two uses of given alloy:
Brass
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Bronze
Select from the following ist:
`Fe_2O_3, , NO, PbO, Mn_2O_7`
Neutral oxide ……………..
Name:
a metal which lacks ductility
Name:
two metallic oxides which are acidic
How many valence electrons are present in:
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Which metals do not corrode easily?
Fill in the Blank and Rewrite the Statements:
Elements showing properties of both metals and nonmetals are known as _________.
Give reason for the following:
Rusting reduces the structural strength of iron.
Generally, non-metals are not lustrous. Which of the following non-metal is lustrous?
