Chemistry

Chemistry is the science of matter, especially its chemical reactions, but also its composition, structure and properties.Chemistry is concerned with atoms and their interactions with other atoms, and particularly with the properties of chemical bonds.

Chemistry is sometimes called "the central science" because it connects physics with other natural sciences such as geology and biology.Chemistry is a branch of physical science but distinct from physics.

The etymology of the word chemistry has been much disputed.The genesis of chemistry can be traced to certain practices, known as alchemy, which had been practiced for several millennia in various parts of the world, particularly the Middle East.

The word chemistry comes from the word alchemy, an earlier set of practices that encompassed elements of chemistry, metallurgy, philosophy, astrology, astronomy, mysticism and medicine; it is commonly thought of as the quest to turn lead or another common starting material into gold. The word alchemy in turn is derived from the Arabic word al-kīmīā, meaning alchemy.

The word al-kīmīā is derived from the word Chemi or Kimi, which is the ancient name of Egypt in Egyptian. An alchemist was called a 'chemist' in popular speech, and later the suffix "-ry" was added to this to describe the art of the chemist as "chemistry".

Chemistry can be categorized into three parts:

1. Physical Chemistry

2. Inorganic Chemistry

3. Organic Chemistry

Several concepts are necessary to understand the chemistry.