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प्रश्न
Name two physical properties of carbon in which it's behaviour is not as expected from it's classification as non-metal.
उत्तर
Non-metals are generally soft. But carbon in the form of diamond is extremely hard.
Non-metals are generally non-lustrous. But carbon in the form of diamond is a lustrous (shiny) substance.
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संबंधित प्रश्न
Give reasons for the following.
Immersion rods for heating liquids are made up of metallic substances.
The electronic configurations of three elements A, B and C are as follows:
| A | 2, 8, 1 |
| B | 2, 8, 7 |
| C | 2, 4 |
(a) Which of these element is a metal?
(b) Which of these elements are non-metals?
(c) Which two elements will combine to form an ionic bond?
(d) Which two elements will combine to form a covalent bond?
(e) Which element will form an anion of valency 1?
Which of the following alloys contains a non-metal as one of the constituents?
(a) brass
(b) amalgam
(c) steel
(d) bronze
Write ‘True’ or ‘False’ in front of following statement.
Graphite is used in making filaments of electric bulb.
State two important uses of following non-metal
Uses of oxygen
What are metalloids: Give examples.
Name:
a non- metal used in alloys
Name:
the compound responsible for green deposit on the surface of copper
_______ is good conductor of heat but bad conductor of electricity.
The atomic number of an element ‘X’ is 12. Which inert gas is nearest to X?
