Which properties will elements in group 17 share, based on location in the periodic table?

Elements in Group 17 of the periodic table are known as halogens. They share several properties, including:

Poor thermal conductivity: Halogens do not conduct heat well.

Poor electrical conductivity: Halogens are also poor conductors of electricity. In comparison:

Good thermal conductivity and Good electrical conductivity are properties typically associated with metals, not halogens.

References:

Integrated Physical Sciences Learning Resources, Chapter on Periodic Table Groups