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प्रश्न
Comment on the (i) reactivity (ii) colour (iii) physical state of group 17 elements.
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उत्तर
Group 17 elements or halogens:
- Reactivity: Halogens are the most reactive non-metals, their reactivity decreases down the group. Fluorine is the most reactive halogen and iodine is the least reactive halogen.
- Colour: Fluorine is a pale yellow gas, chlorine is a greenish-yellow gas, bromine is a reddish-brown liquid and iodine is a violet solid.
- Physical state: Gaseous
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संबंधित प्रश्न
Arrange the Elements of Group 17 and Group 1 According to the Given Conditions.
Increasing order of atomic size,
What are the following group known as?
Group 1
Name and state the following with reference to the elements of the first three periods of the periodic table.
Noble gas with duplet arrangement of electrons.
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.
Name the alkali metals, How many electron(s) they have in their outermost orbit.
Name the gas used in:
Light bulbs
Give reason:
Inert gases do not form compounds.
Write a short note on the following type of element –
halogens
Give a reason for the following:
Noble gases do not form compounds readily.
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 |
