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Question
Fluorine, chlorine and Bromine are put in one group on the basis of their similar properties.
What are those similar properties?
Solution
In a particular group, electrons in the outermost orbit remain the same.
Fluorine, Chlorine and Bromine all have 7 electrons in their outermost orbit, showing similar properties. These properties are:
- They form acidic oxides.
- They form hydrides with hydrogen.
- They form negative ions.
- They dissolve quite effectively in CS2, alcohol, and chloroform but only slightly in water.
- They are coloured and non-metals.
- Their B.P. and M.P. rise as they move down in the group.
- Due to their high reactivity, they are usually found in a combined state.
- They are good oxidising agents.
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