what is the structure of atom
Answers
Atoms are the smallest fraction of an element that can exist, and still show the characteristics of the element. Atoms themselves are composed essentially of electrons (1 negative charge), protons (1 positive charge), and neutrons (no charge
Atoms consist of three basic particles: protons, electrons, and neutrons. The nucleus (center) of the atom contains the protons (positively charged) and the neutrons (no charge). The outermost regions of the atom are called electron shells and contain the electrons (negatively charged).
Main features of the structure of atoms are :
Atoms of all the elements (except hydrogen) are made up of 3 fundamental (sub-atomic) particles: electrons, protons and neutrons. (Hydrogen atom lacks neutrons).
The nucleus is locatedat the centre of the atom. It contains protons and neutrons, which account for the total mass of that atom.
The nucleus is positively charged due to the presence of protons in it.
The electrons are outside the nucleus and have negligible mass.
The number of electrons in an atom is equal to the number of protons in it, hence the atom is electrically neutral.
The electons revolve rapidly in fixed circular paths around the nucleus. These circular paths are called energy levels or shells or orbits.
The atoms of different elements contain different numbers of electrons, protons and neutrons.
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