Question

1. some physical properties of elements in a group of the periodic table are described below. poor conductor of electricity poor conductor of thermal energy atoms contain seven valence electrons brittle in the solid state low melting points and boiling points the elements described above belong to which group? halogens alkaline earth metals noble gases alkali metals

Explanation:

Halogen elements have 7 valence - electrons, are poor conductors of heat and electricity, brittle in solid state, and have low melting and boiling points. Alkaline earth metals are good conductors, noble gases are inert with full - valence shells, and alkali metals are good conductors and soft.

Answer:

Halogens