Ammonia

Some air has a very strong smell.

This gas is called ammonia. It is a clear gas. It is lighter than the air around us.

This gas helps plants grow. People use it to make food for them. Most of it is used for this. It is also used to clean things.

Animals make this gas too. Most animals get rid of it in their pee. It can be dangerous to touch or breathe. It can hurt living things.

We can find this gas in space. It is on planets like Mars and Jupiter.

It is even on the cold world of Pluto. It helps stay liquid in very cold places. This is a very busy gas!

Ammonia is a clear gas. It has a very strong smell.

It is made of nitrogen and hydrogen. This gas is lighter than the air.

People use ammonia in many ways. About 70% of it helps make fertilizers. These are foods that help plants grow.

It is also used to make cleaners and explosives. Some people use it to keep things cold.

Ammonia is found in space too. It is on planets like Jupiter and Mars.

On the cold world of Pluto, it acts like antifreeze. This helps keep oceans liquid under the ice.

In the body, ammonia is a waste product. Most animals get rid of it in their urine. It is often found as urea.

Because it can hurt cells, it must be removed. In nature, tiny living things called bacteria help change it. This helps keep the cycle of life moving.

Ammonia is a colorless gas that has a very strong, sharp smell. It is an inorganic compound made of nitrogen and hydrogen. This gas is lighter than the air around us. Because it is so useful, it is used for many different jobs. Most of it is used to make fertilizers for farming. About 70% of all industrial ammonia helps grow food. It is also used in cleaners, explosives, and cooling systems.

There are many ways ammonia moves through our world. In nature, tiny living things like bacteria perform nitrogen fixation. This process turns nitrogen into a form plants can use. Humans also make ammonia using the Haber process. This method creates large amounts of cheap fertilizer for crops. Once made, ammonia travels in many ways. It can move by road in large tankers. It can also travel by rail in wagons or by sea in gas carriers.

People have known about ammonia for a very long time. The name comes from the Egyptian god Amun. Priests at his temples used to burn soil that smelled like ammonia. This soil came from animal waste near the temples. An ancient writer named Pliny also wrote about a salt related to it. He lived in the Roman province of Cyrenaica. Even though the history is old, the science is still very important today.

Ammonia is found in many amazing places in space. It is on Earth, Mars, and Venus. You can also find it on giant planets like Jupiter and Saturn.

On the small, icy world of Pluto, ammonia acts like antifreeze. A mix of water and ammonia stays liquid at much lower temperatures. This might allow Pluto to have oceans hidden under its ice.

This helps the planet stay geologically active even when it is very cold.

In your own body, ammonia plays a specific role. It is a common waste product for living things. Because it can be toxic and damage cells, animals must remove it. Most animals get rid of it through their urine. It is often turned into a substance called urea first. This is just like how your body handles other waste to stay healthy. It is a natural part of how life works every day.

Ammonia is an inorganic chemical compound made of nitrogen and hydrogen. It has the chemical formula NH3. This substance is a colorless gas with a very sharp, pungent smell. It is a stable binary hydride and is the simplest pnictogen hydride. Ammonia is highly significant because it serves as a fundamental building block for many other chemicals. It is also a vital part of the global food system. About 70% of all industrially produced ammonia is used to create fertilizers. These fertilizers help provide the nutrients that terrestrial organisms need to grow.

To understand how an ammonia molecule is built, we can look at its shape. The molecule has a trigonal pyramidal shape. This shape is predicted by the valence shell electron pair repulsion theory, often called VSEPR theory. In this structure, a central nitrogen atom is bonded to three hydrogen atoms. The nitrogen atom has five outer electrons. When it bonds with the three hydrogens, it uses three electrons for the bonds. This leaves one lone pair of electrons. This lone pair repels the bond pairs more strongly than they repel each other. Because of this extra repulsion, the bond angle is 106.7 degrees rather than the standard 109.5 degrees found in a regular tetrahedron. This specific shape gives the molecule a dipole moment and makes it polar.

Ammonia can exist in several different physical states depending on its environment. As a gas, it is lighter than air, with a density only 0.589 times that of air. It can be easily liquefied because of strong hydrogen bonding between its molecules. In its liquid form, ammonia is a powerful ionizing solvent. This means it can dissolve many different substances. For example, liquid ammonia can dissolve alkali metals. This process creates highly colored, electrically conductive solutions. These solutions contain solvated electrons, which are free electrons surrounded by a cage of ammonia molecules. At low concentrations, these solutions appear deep blue. At higher concentrations, they look metallic and can conduct electricity.

There are several ways ammonia is produced and moved around the world. In nature, ammonia is created through a process called nitrogen fixation. However, humans produce much more ammonia through an industrial method known as the Haber process. This discovery revolutionized agriculture by providing a way to make cheap fertilizers. In 2021, the global industrial production of ammonia reached 235 million tonnes. To move this massive amount of material, companies use various transportation methods. They use tankers on roads, tank wagons on rails, and gas carriers on the sea. They also use pressurized cylinders for smaller amounts.

The history of the name "ammonia" is tied to ancient times and religious sites. The name is derived from the Egyptian deity Amun. In Greek, this deity was called Ammon. Near the temples of these gods, priests and travelers would burn soil that was rich in ammonium chloride. This soil came from animal dung and urine. The Roman writer Pliny also mentioned a salt called hammoniacum in his work, Natural History. He noted its proximity to the Temple of Jupiter Amun in Cyrenaica. While some believe this was actually common sea salt, the name for these compounds remained tied to the ancient god.

Ammonia is also a fascinating subject in the study of space and astronomy. It is not just found on Earth; it is present throughout the Solar System. Scientists have detected it on Venus, Mars, Jupiter, Saturn, Uranus, Neptune, and Pluto.

On smaller, icy bodies like Pluto, ammonia plays a very important geological role. It can act as an antifreeze. When ammonia mixes with water, the resulting mixture has a much lower melting point. This allows icy worlds to potentially retain internal oceans and stay geologically active even at extremely low temperatures.

Finally, we must consider how ammonia interacts with the atmosphere and living things. In the atmosphere, ammonia comes from natural sources and human activities like agriculture. About 80% of atmospheric ammonia comes from agriculture, including fertilizers and livestock manure. Ammonia can also react with sulfuric and nitric acids to form sulfate-nitrate aerosols. These aerosols can impact both the climate and human health. Inside living animals, ammonia is a common nitrogenous waste. Because it is toxic and can damage cells and tissues, most animals must excrete it. They typically do this through urine, often by converting it into a substance called urea first.