Comment on the (i) reactivity (ii) colour and (iii) physical state of group 17 elements.

Comment on the physical state of group 17 elements.

Comment on the reactivity of group 17 elements.

Comment on the colour of group 17 elements.

State two properties of group I elements.

Comment on the colour and magnetic behaviour of dipositive ions of group 2 elements.

Discuss the trends in chemical reactivity of group 15 elements.

Based on the group valency of elements state the formula for the following giving justification for each : (i) Oxides of 1st group elements, (ii) Halides of the elements of group 13, (iii) Compounds formed when an element of group 2 combines with an element of group 16.

What is the highest oxidation state exhibited by group 17 elements ?

Radioactive element of group 17 is

Name all the elements of group 17.