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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 17
What happens to the number of valence electrons in atoms of elements as we go down a group of the periodic table?
How do alkaline earth metals occur in nature?
Give reason:
Alkali metals are kept in an inert solvent.
Write a short note on the following type of element –
alkali metals
Write a short note on the following type of element –
halogens
Give a reason for the following:
Noble gases do not form compounds readily.
Give a reason for the following:
Group 1 [I – A] elements are called alkali metals.
