Basicity: strongly acidic

Elements react strongly acidic.

Nitrogencolorless gas, liquid or solid

Fluorinevery pale yellow (gas); bright yellow (liquid); alpha is opaque, beta is transparent (solid)

Sulfuryellow sintered microcrystals

Chlorinepale yellow-green gas

Chromiumsilvery metallic

Manganesesilvery metallic

Seleniumgrey metallic-looking, red, and vitreous black allotropes

Brominereddish-brown

Molybdenumgray metallic

Technetiumshiny gray metal

Iodinelustrous metallic gray (solid); black/violet (liquid); violet (gas)

Legend