Atom .

Atom is a basic unit of matter, which consists of atomic nuclei and negatively charged electron cloud that surrounds it. The nucleus consists of positively charged protons, and neutrons are electrically neutral (except hydrogen-1 nucleus, which has no neutrons). The electrons in an atom bound to the nucleus by electromagnetic force. As well as a set of atoms can bind to each other, and form a molecule. Atom that contain the number of protons and electrons the same neutral, while containing a number of different protons and electrons are positive or negative and is referred to as ions. Atoms are grouped based on the number of protons and neutrons contained in the nucleus. The number of protons in an atom determines the chemical element the atom, and the number of neutrons determines the isotope of the element.
The term comes from Greek atom (ἄτομος / Atomos, α-τεμνω), which means it can not be cut or something that can not be subdivided. The concept of atoms as a component that can not be subdivided first proposed by the philosophers of India and Greece. In the 17th century and into the 18th, the chemists laid the foundations of this idea by showing that certain substances can not be subdivided further using chemical methods. During the late 19th century and early 20th century, physicists managed to find the structure and components of subatomic particles in atoms, proving that the 'atom' is not can not be subdivided. The principles of quantum mechanics used by physicists and then successfully model the atom. [1]
In everyday observation, the atom is considered a relatively very small objects that have mass also proportionally smaller. Atom can only be monitored by using special equipment such as atomic force microscopy. More than 99.9% of the mass of atoms centered on the nucleus, [note 1] with protons and neutrons are almost the same mass. Each element has at least one isotope with unstable nuclei, that can undergo radioactive decay. This can lead to transmutation, which change the number of protons and neutrons in the nucleus. [2] Electrons are bound to contain a number of atomic energy level, or orbital, which is stable and can undergo transitions between these level by absorbing or emitting photons that correspond to differences between the energy level. Electrons in atoms determines the chemical properties of an element, and influence the magnetic properties of these atoms.
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With so much history about the atom,,,, until now I do not know for certain who themember's name was first ????? Atom and why his name should be an atom??