# chemistry

> branch of physical science concerned with the composition, structure and properties of matter

**Wikidata**: [Q2329](https://www.wikidata.org/wiki/Q2329)  
**Wikipedia**: [English](https://en.wikipedia.org/wiki/Chemistry)  
**Source**: https://4ort.xyz/entity/chemistry

## Summary
Chemistry is the branch of physical science that studies the composition, structure, and properties of matter. It explores how substances interact, transform, and combine to form new materials, underpinning advancements in fields like medicine, materials science, and environmental studies. As a foundational discipline, chemistry bridges theoretical principles with practical applications, driving innovation across industries.

## Key Facts
- **Definition**: Chemistry is the scientific study of matter's composition, structure, properties, and reactions.
- **Subdisciplines**: Includes organic chemistry, inorganic chemistry, physical chemistry, analytical chemistry, and biochemistry, among others.
- **Historical Roots**: Evolved from alchemy, a protoscientific practice focused on transmutation and cosmic inquiry.
- **Key Concepts**: Atomic theory, chemical bonding, thermodynamics, and reaction mechanisms.
- **Applications**: Drug discovery, materials engineering, environmental analysis, and forensic science.
- **Notable Tools**: Spectroscopy, chromatography, and computational modeling.
- **Interdisciplinary Links**: Overlaps with physics, biology, and materials science.
- **Education**: Taught at academic institutions worldwide, with degrees ranging from undergraduate to doctoral levels.
- **Global Impact**: Essential for addressing challenges like climate change, energy sustainability, and public health.

## FAQs
### Q: What is the primary focus of chemistry?
A: Chemistry investigates the composition, structure, and properties of matter, emphasizing how substances interact and transform.

### Q: How does chemistry differ from physics?
A: While physics studies fundamental laws of energy and motion, chemistry applies these principles to understand matter's behavior at atomic and molecular levels.

### Q: What are the main branches of chemistry?
A: Key branches include organic, inorganic, physical, analytical, and biochemistry, each addressing distinct aspects of chemical systems.

### Q: What role does chemistry play in daily life?
A: Chemistry underpins everyday products like medicines, plastics, and fuels, directly impacting healthcare, technology, and environmental sustainability.

### Q: Who are some influential figures in chemistry?
A: Pioneers include Marie Curie (radioactivity), Dmitri Mendeleev (periodic table), and Linus Pauling (chemical bonding), among many others.

## Why It Matters
Chemistry is fundamental to understanding the material world and driving technological progress. It enables the development of new materials, fuels, and medicines, addressing global challenges such as energy scarcity and disease. By elucidating molecular interactions, chemistry informs environmental conservation efforts and industrial processes, ensuring sustainable practices. Its principles are indispensable to fields like nanotechnology, bioengineering, and climate science, making it a cornerstone of modern scientific inquiry.

## Notable For
- **Atomic Theory**: Chemistry introduced the concept of atoms as fundamental units of matter.
- **Periodic Table**: Organizes elements by atomic structure, predicting properties and behaviors.
- **Synthetic Innovations**: Enables the creation of novel compounds, from pharmaceuticals to advanced materials.
- **Analytical Techniques**: Develops tools like mass spectrometry and NMR for precise material analysis.
- **Sustainability Solutions**: Contributes to renewable energy technologies and pollution mitigation strategies.

## Body
### Core Principles
Chemistry is rooted in atomic theory, which posits that matter consists of discrete atoms. It explores chemical bonding, including ionic, covalent, and metallic interactions, and examines reaction dynamics through thermodynamics and kinetics. Key concepts like stoichiometry and equilibrium govern quantitative analysis and process optimization.

### Subdisciplines
- **Organic Chemistry**: Studies carbon-based compounds, focusing on synthesis and reaction mechanisms.
- **Inorganic Chemistry**: Examines inorganic and organometallic compounds, emphasizing material properties.
- **Physical Chemistry**: Applies physics principles to chemical systems, studying macroscopic and microscopic phenomena.
- **Analytical Chemistry**: Develops methods for separating, identifying, and quantifying chemical components.
- **Biochemistry**: Investigates chemical processes in living organisms, bridging biology and chemistry.

### Historical Development
Emerging from alchemy, chemistry transitioned to a rigorous science in the 18th century with Antoine Lavoisier's work on elemental conservation. The 19th century saw the formulation of the periodic table by Dmitri Mendeleev, while the 20th century brought quantum mechanics, revolutionizing molecular structure understanding.

### Tools and Techniques
Modern chemistry employs advanced instrumentation, including spectrometers, chromatographs, and computational software. Techniques like X-ray crystallography and electron microscopy enable atomic-level visualization, while machine learning accelerates compound discovery and property prediction.

### Societal Impact
Chemistry drives innovation in pharmaceuticals, agriculture, and energy. It addresses environmental issues through pollution analysis and remediation, and supports forensic science in criminal investigations. Educational initiatives promote chemical literacy, fostering public engagement with scientific advancements.

### Interdisciplinary Connections
Chemistry intersects with physics in thermodynamics and quantum theory, with biology in biochemistry and molecular biology, and with engineering in materials science and chemical engineering. This cross-disciplinary nature amplifies its relevance across diverse fields.

### Notable Achievements
- **Synthetic Dyes**: The first synthetic dye, mauveine, marked the birth of the chemical industry.
- **Penicillin**: Alexander Fleming's discovery of penicillin exemplifies chemistry's role in medicine.
- **Nanotechnology**: Chemical synthesis of nanoparticles enables breakthroughs in electronics and medicine.

### Challenges and Future Directions
Contemporary chemistry tackles issues like sustainable synthesis, energy storage, and biomaterial development. Emerging fields such as green chemistry prioritize eco-friendly processes, minimizing waste and toxicity. Computational chemistry accelerates drug discovery, while materials chemistry designs smart materials for advanced applications.

### Cultural and Ethical Considerations
Chemistry raises ethical questions regarding synthetic biology, chemical warfare, and environmental responsibility. Public perception is influenced by both beneficial innovations and historical misuse, underscoring the need for responsible research and communication.

### Global Collaboration
International organizations like the International Union of Pure and Applied Chemistry (IUPAC) standardize terminology and promote collaboration. Global challenges, such as climate change, necessitate cross-border research efforts, leveraging chemistry's universal principles for collective benefit.

## References

1. Directory of Open Access Journals
2. Iowa State University Library Vocabularies
3. [Source](https://lingualibre.fr/wiki/Q214046)
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5. Nuovo soggettario
6. Freebase Data Dumps. 2013
7. [Nuovo soggettario](https://thes.bncf.firenze.sbn.it/termine.php?id=788)
8. [Registros de autoridad de "Materia" de la Biblioteca Nacional de España. Spain open data portal](https://www.bne.es/media/datosgob/catalogo-autoridades/materia/materia-UTF8.zip)
9. YSO-Wikidata mapping project
10. BabelNet
11. UMLS 2023
12. FactGrid
13. National Library of Israel
14. CC 6
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16. [Source](https://vocabs.ardc.edu.au/viewById/316)
17. All Science Journal Classification Codes
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19. [Source](https://www.dfg.de/dfg_profil/gremien/fachkollegien/faecher/)