Respuesta :

hartkristiny

Answer:

Colorless. Although they have similar properties they are not identical. for example as you descend group zero the density of the gass increases as does the mass of a single atom. All the halogens exist as molecules bonding covalent to their own atoms adding stability as they complete their full outer shell

roshani90

Answer:

Colourless. Although they have similar properties they are not identical. For example, as you descend Group 0 the density of the gas increases as does the mass of a single atom. ... All the halogens exist as molecules, bonding covalently to their own atoms - adding stability as they complete their full outer shells.

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