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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 is meant in the periodic table by a group?
What are the following group known as?
Group 1
How do atomic structures (electron arrangements) change in a period with an increase in atomic numbers moving left to right?
Name the first three alkaline earth metals.
Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.
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 –
alkali metals
Give a reason for the following:
Noble gases do not form compounds readily.
State the following:
The group whose elements are unreactive or inert.
