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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
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?
Name the alkali metals, How many electron(s) they have in their outermost orbit.
Write the reactions of the first three alkaline earth metals with dilute hydrochloric acid.
How do alkaline earth metals occur in nature?
Name the gas used in:
Light bulbs
Write a short note on the following type of element –
alkali metals
Write a short note on the following type of element –
halogens
Select the correct answer from the options given below.
The most reactive halogen from group 17.
State the following:
The group whose elements are unreactive or inert.
