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The number of halogens known as so far is

$\begin{array}{1 1}4\\5\\6\\7\end{array} $

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Answer : 5
The halogens are a group in the periodic table consisting of five chemically related elements: fluorine (F), chlorine (Cl), bromine (Br), iodine (I), and astatine (At).
The number of halogens known as so far is 5
answered Jul 28, 2014 by sreemathi.v
edited Nov 24, 2017 by sharmaaparna1
 
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