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2014-08-20T21:36:49+05:30
Where u found HA there's no HA in modern periodic table instead there are Hf and Hg, which are Hafnium and mercury respectively.
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2014-08-21T02:43:34+05:30

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It could possibly the heading of group 17 elements by name HA,  HALOGENS. these are chlorine, bromine, astatite etc.

or the halide Hydrogen Astatide  : HAt  perhaps
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