Anyone who has cleaned with Windex has whiffed ammonia, a substance with a rich and interesting history that includes its very name: link. Note that ammonia was once called animal alkali. Muslims-in-science scholars should take note of the origin of the word alkali, but should take care not to get the concept of alkaline bases etymologically confused with that other Arabic word meaning base.
Ammonia gas easily condenses into a liquid when compressed (Albert Einstein and his erstwhile student Leó Szilárd once patented a refrigerator with no moving parts that used ammonia instead of freon). If Szilárd's idea had gone anywhere, he may not have bothered to have conceived the atomic bomb.
Ammonia has been variously depicted as NH3 or better as :NH3 or better still with its electron "lone pair" on full display, as: