Elements in group 7A in the periodic table are the halogens; elements in group 6A are called the chalcogens.?

What is the most common oxidation state of the chalcogens compared to the halogens?

The chalcogens have 6 valence electrons and the halogens have 7 valence electrons. This is the reason that the most common oxidation state for the chalcogens is -2, while the most common oxidation state for the halogens is -1. Also, oxidation states should always be shown with a sign, either positive or negative. You were correct.

Source(s): I am a Chemistry teacher.

Periodic Table 6a

On the new periodic table the Noble gases or inert gases are column 18. It’s notion that they were renamed Noble gases seeing that the nobles sat round and didnt do any work and the inert gases do not react so that they do no work. They make up lower than one percent of the atmosphere. They had been found out after we first did fractional distillation of liquid air. The all are used in areas the place we don’t want reactions. Helium replaces hydrogen in balloons, after the Hindenberg Neon is utilized in neon lights for promoting. Argon is used inside light bulbs to prevent the filament from burning up. Xenon is utilized in strobe lights. Radon is radioactive and we need to hinder it. Folks have their homes checked to ᴘᴇᴇr whether it is gift in the basᴇмᴇɴt. It is produced with the aid of the degeneration of uranium in rocks.

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