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Question
Name the gas used in:
Filling balloons
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Solution
Helium
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RELATED QUESTIONS
What are the following group known as?
Group 18
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.
Take any one alkali metal and write its reaction with (i)oxygen (ii)water (iii)acid.
Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.
Write the electronic configuration of the first two alkaline earth metals.
State the characteristics which remain similar in moving down in a group of the periodic table.
Write a short note on the following type of element –
alkaline earth metals
State the following:
The group from the groups 1 [IA], 2 [IIA], 16 [VIA] and 7 [VIIA] whose elements are most electronegative.
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 |
