Question: Preferably without consulting reference material, write out the halogens as they appear in the periodic table, and indicate the trends in (a) Physical state (s,

Preferably without consulting reference material, write out the halogens as they appear in the periodic table, and indicate the trends in 

(a) Physical state (s, l, or g) at room temperature and pressure,

(b) Electronegativity, 

(c) Hardness of the halide ion, 

(d) Colour.

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