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Question
With reference to the physical properties of metals and non-metals, state the following exception.
A metal which floats on water.
Solution
Lithium (Li), Sodium (Na), Potassium (k).
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RELATED QUESTIONS
Match the substances given in Column A with their uses given in Column B.
| A | B | ||
| 1 | Gold | a | Thermometers |
| 2 | Iron | b | Electric wire |
| 3 | Aluminium | c | Wrapping food |
| 4 | Carbon | d | Jewellery |
| 5 | Copper | e | Machinery |
| 6 | Mercury | f | Fuel |
Name one metal which has a low melting point.
Name one property which is characteristic of non-metals.
What is meant by "brittleness"? Which type of elements usually show brittleness: metals or non-metals?
The electronic configurations of four particles A, B, C and D given below:
| A | 2, 8, 8 |
| B | 2, 8, 2 |
| C | 2, 6 |
| D | 2, 8 |
Which electronic configuration represents:
(i) magnesium atom?
(ii) oxygen atom?
(iii) sodium ion
(iv) chloride ion?
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A non-metal used to purify water is ______.
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A chemical compound that makes up the striking heads of match sticks is ______
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the compound responsible for green deposit on the surface of copper
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occurrence of metals
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Describe a simple experiment to prove that a copper wire conducts electricity, but a piece of coal does not.
Select the appropriate option for the following statement:
The element placed in the extreme left of the Modern Periodic Table.
Match the columns.
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| 2. Making metal utensils | b) Malleability |
| 3. Making Copper wires | c) Good conductor of heat |
| 4. Making bells from metal | d) Ductility |
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Mercury is the only metal that is liquid at room temperature.
