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Structure of Atom

Tutormate > CBSE Syllabus-Class 9th Chemistry > Structure of Atom

01 Atoms

Matter is made up of tiny particles called atom.
Maharishi Kanada was the first scientist who came up with the concept of divisibility of matter and named the smallest unit as paramanu.
Later scientists discovered that atoms are further made up of three subatomic electrons, protons and neutrons.
Protons and neutrons are present in a small nucleus at the centre of the atom.
Electrons surround the nucleus.
Nucleus is the bulk mass present at the centre of the atom.
An atom is electrically neutral because it contains an equal number of positively charged protons and negatively charged electrons.
Similar to a solar system in which planets revolve around the sun, electrons revolve around the nucleus in an atom.

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