หมวดหมู่:fi:นิกโทเจน

ฟินแลนด์ terms for types or instances of chemical elements in group 15 of the periodic table, which all have 5 valence electrons.

NOTE: This is a set category. It should contain terms for นิกโทเจน, not merely terms related to นิกโทเจน. It may contain more general terms (e.g. types of นิกโทเจน) or more specific terms (e.g. names of specific นิกโทเจน), although there may be related categories specifically for these types of terms.