What is Chemistry – Definition, Types, Methods

What is Chemistry



Chemistry is the scientific study of the composition, structure, properties, and behavior of matter. It is the branch of science that deals with the elements and compounds composed of atoms, molecules, and ions. Chemistry also deals with chemical reactions and processes.

Chemistry is considered a central science because it connects other natural sciences such as biology, geology, and physics. It also has applications in medicine, engineering, and technology.

The word “chemistry” comes from the Greek word “khēmia”, which means “alchemy”. Alchemy was a medieval chemical science that focused on the transmutation of metals into gold.

History of Chemistry

The origins of chemistry can be traced back to the ancient Greeks, who were the first to develop a systematic approach to investigating the properties of matter. However, it was not until the early nineteenth century that chemistry began to develop as a true science.

One of the most important figures in the history of chemistry is Antoine Lavoisier, who is considered to be the father of modern chemistry. Lavoisier helped to establish many of the principles that are still used by chemists today, such as the law of conservation of mass. He also developed methods for accurately measuring chemical reactions, which laid the foundation for quantitative analysis.

Since Lavoisier’s time, chemistry has continued to evolve and grow in scope and complexity. Today, chemistry is a vast subject that involves the study of the composition, structure and properties of matter, as well as the study of how matter changes over time.

While chemistry can be studied at different levels (e.g. introductory, intermediate and advanced), it is taught in the same basic way throughout many of the world’s universities.

Branches of Chemistry

There are various branches of chemistry, dealing with the composition, structure and properties of matter. These branches are as follows:

  • Analytical Chemistry
  • Biochemistry
  • Inorganic chemistry
  • Materials Chemistry
  • Neurochemistry
  • Nuclear chemistry
  • Organic chemistry
  • Physical chemistry
  • Theoretical Chemistry

Analytical Chemistry

Analytical chemistry is the study of the separation, identification, and quantification of matter. In other words, it is the science of understanding the composition of materials. Analytical chemists use their knowledge to help solve problems in a wide variety of industries, including medicine, forensics, environmental science, and manufacturing.


Biochemistry, also known as biological chemistry, is the study of chemical processes within and relating to living organisms. By controlling information flow through biochemical signaling and the flow of chemical energy through metabolism, biochemical processes give rise to the complexity of life.

Inorganic chemistry

Inorganic chemistry is the study of matter that does not contain carbon or hydrogen. This branch of chemistry includes the study of minerals, metals, and semiconductors. Inorganic chemistry is essential to many industries, including the production of pharmaceuticals, cosmetics, pigments, and petrochemicals. Inorganic chemists use a variety of techniques to study the properties of inorganic compounds, including X-ray diffraction, nuclear magnetic resonance spectroscopy, and electron microscopy.

Materials Chemistry

Materials Chemistry is the study of the synthesis, structure, and properties of materials. It encompasses both traditional fields such as ceramics and metallurgy, as well as newer fields such as nanomaterials and optoelectronics.

Materials chemists use their knowledge of chemical principles to design and produce new materials with specific properties. These materials have a wide range of applications, from semiconductors to construction materials to biological implants.


Neurochemistry is the study of chemicals in the nervous system. These chemicals, called neurotransmitters, are responsible for transmitting signals between neurons. Neurochemistry is a branch of neuroscience that deals with the chemical basis of neural activity.

The human nervous system is made up of billions of neurons, which are interconnected by synapses. Neurotransmitters are released from neurons at synapses and bind to receptors on adjacent neurons, thereby causing a change in the electrical potential of the neuron. This change in potential can result in the firing of an action potential down the neuron’s axon.

Nuclear chemistry

Nuclear chemistry is the subfield of chemistry that is concerned with changes in the nucleus of atoms. It covers a wide range of topics, from the nature of the strong force to the origins of the elements.

Nuclear chemistry has its roots in radioactivity, which was first discovered in 1896 by French physicist Henri Becquerel. Radioactivity is the phenomenon whereby some nuclei spontaneously emit particles or radiation. This emission can take the form of alpha particles, beta particles, or gamma rays.

Organic chemistry

Organic chemistry is a branch of chemistry that deals with the structure, properties, composition, reactions, and synthesis of organic compounds. Organic molecules are molecules that contain carbon atoms. The study of organic molecules is called organic chemistry.

Physical chemistry

Physical chemistry is a branch of chemistry that deals with the physical properties of molecules and atoms. It is concerned with how these properties arise from the underlying structure of matter. Physical chemistry uses the tools of physics and mathematics to understand and predict the behavior of chemical systems.

Theoretical Chemistry

Theoretical chemistry is the branch of chemistry that uses principles of physics to study the behavior of molecules and atoms. It is a relatively new field, having only been established in the early 1900s. Theoretical chemists use math and computers to model chemical systems and predict how they will behave.

Theoretical chemistry is important because it allows scientists to understand and predict the behavior of molecules without having to perform time-consuming and expensive experiments. It also allows them to study chemical reactions that would be too dangerous or difficult to carry out in a lab.

Purpose of Chemistry

The purpose of chemistry is to understand how matter works. Chemistry allows us to understand how the world works at a fundamental level. It helps us to understand how things are made and how they work. It also helps us to understand the interactions between different substances.

Chemistry plays an important role in our daily lives. It helps us to understand the products we use, the food we eat, and the air we breathe. Chemistry is also important for understanding environmental issues and for developing new technologies.

About the author

Muhammad Hassan

Researcher, Academic Writer, Web developer