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Question
‘The periodic table contains elements methodically grouped together’.
Solution
The periodic table contains elements methodically grouped together like [I-A] alkali group [II-A] alkali earth group, halogens [17 OR 7-B] group, normal elements. Transition elements, noble gases [O-group], etc. If we know the properties of one member of a family, we know the properties of other members of the same family will be similar.
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RELATED QUESTIONS
Name and state the following with reference to the elements of the first three periods of the periodic table.
Group whose elements have zero valencies.
How do alkaline earth metals occur in nature?
Write the electronic configuration of the first two alkaline earth metals.
Name the gas used in:
Light bulbs
Name the gas used in:
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Give reason:
Alkali metals are kept in an inert solvent.
Give reason:
Alkali metals and halogens do not occur free in nature.
State the characteristics which remain similar in moving down in a group of the periodic table.
State the following:
The group whose elements are unreactive or inert.
Match the elements of List – I with their type from List – II.
| List – I | List – II |
| 1. Highly reactive, univalent metals | A: Halogens |
| 2. Highly reactive, univalent non-metals | B: Transition elements |
| 3. Unreactive, inert elements | C: Alkali metals |
| 4. Elements of group 3 to 12 [IB to VII B and VIII] | D: Lanthanide series |
| 5. Radioactive elements | E: Noble gases |
| F: Actinide series |
