CrosswordOpener.com - we know the word that you can`t guess In case of any inconvenience..
A compound containing nitrogen and a more electropositive element (such as phosphorus or a metal)
Else clues• Ammonia or fertilizer
• Boron compound
• Element No. 7 compound
• Nitrogen compound
• Ammonia or fertilizer
• Boron compound
• Element No. 7 compound
• Nitrogen compound