Flashcards for NEET Chemistry - Structure of Atom

Flashcards for NEET Chemistry are designed to boost your NEET preparation. Find below flashcards for the chapter “Structure of Atom”. These flashcards are prepared as per the NEET syllabus. These are helpful for aspirants of NEET and other exams during last-minute revision. It covers all the important points that are frequently asked in the exam. Check BYJU’S for the full set of Flashcards and Study material for NEET Chemistry.

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Structure of Atom

NEET exams

flashcards for neet chemistry nov12 structure of atom 1
flashcards for neet chemistry nov12 structure of atom 2
flashcards for neet chemistry nov12 structure of atom 3
flashcards for neet chemistry nov12 structure of atom 4


Structure of Atom


Discovered by J.J. Thomson

Negatively charged


Discovered by Ernest Rutherford

Positively charged


Discovered by James Chadwick

Electrically neutral


Atoms with identical atomic numbers but different

atomic mass number


Atoms with the same mass

number but different atomic number

Principal Quantum Number

Labelled as ’n’ and the value of n is a positive integer (n = 1, 2, 3…)

Determines the size and the energy of the orbital and identifies the shell

The number of allowed orbitals in a shell is equal to ‘n2

Azimuthal Quantum Number

Labelled as ’l’ and value of l is 0 to n-1 (l = 0, 1, 2, 3…n-1) for a given value of n

Determines the three-dimensional shape of the orbital

Values of l for subshells s, p, d and f are 0, 1, 2 and 3, respectively

Magnetic Orbital Quantum Number

Labelled as ’ml

Tells about the spatial orientation of the orbital

For a subshell, no. of possible values of ml are 2l+1 and values range from -l to +l

Aufbau Principle

The orbitals are filled in order of their increasing energies

Pauli Exclusion Principle

No two electrons in an atom can have the same set of four quantum numbers

Two electrons present in the same orbital have opposite spins

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