Chemistry
State what is meant by the terms :
(i) subatomic particles,
(ii) nucleus,
(iii) orbits,
(iv) atomic number
(v) mass number with reference to an atom.
Atomic Structure
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Answer
(i) Subatomic particles : The particles into which an atom is divided (i.e., protons, electrons, neutrons) are called the subatomic particles.
(ii) Nucleus : The centre or the nucleus of the atom is the place where the protons and neutrons are found.
(iii) Orbits : The electrons revolve around the nucleus along imaginary paths known as shells or more accurately orbits or orbitals.
(iv) Atomic number : Number of protons or number of electrons present in an atom. [Z]
(v) Mass number [A] : The Mass number of an atom is the total number of protons and neutrons collectively called nucleons in the nucleus of the atom.
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