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en.wikipedia.org/wiki/Atom

An atom is the smallest constituent unit of ordinary matter that has the properties of a chemical .... A consequence of using waveforms to describe particles is that it is mathematically impossible to obtain precise values for ... In the Standard Model of physics, electrons are truly elementary particles with no internal structure.

socratic.org/questions/what-is-the-structure-of-an-atom

Mar 18, 2017 ... An atom contains subatomic particles called protons, neutrons, and electrons.

www.livescience.com/37206-atom-definition.html

Aug 8, 2017 ... Atoms are the basic units of matter and the defining structure of elements. The term "atom" comes from the Greek word for indivisible, because it ...

www.vtaide.com/png/atom.htm

All matter is made up of atoms. An atom is like a tiny solar system. In the center of the atom is the nucleus which is a cluster of protons and neutrons. The protons ...

www.bbc.co.uk/schools/gcsebitesize/science/add_aqa_pre_2011/atomic/atomstrucrev1.shtml

A secondary school revision resource for AQA GCSE Additional Science about atomic structure and bonding.

chemistry.tutorvista.com/inorganic-chemistry/structure-of-an-atom.html

The atomic structure was first described by scientists John Joseph Thomson and Ernest in 1900. This model of atom is still used as basis of modern atomic ...

www.nyu.edu/pages/mathmol/textbook/atoms.html

STRUCTURE OF THE ATOM. Matter has mass and takes up space. Atoms are basic building blocks of matter, and cannot be chemically subdivided by ordinary  ...

www.ask.com/youtube?q=Describe+the+Structure+of+an+Atom&v=aY01yz18ahE
Dec 8, 2014 ... An atom is the smallest particle o matter that has an independent existence. It is too small to be viewed even under a powerful microscope.

chemistry.tutorcircle.com/inorganic-chemistry/structure-of-an-atom.html

Describe the Structure of an Atom; Basic Structure of an Atom; Explain the Structure of an Atom; Subatomic Structure of an Atom; Properties of an Atom; Law of ...