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Q.

Principal quantum number of an atom represents:

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a

space orientation of the orbital

b

size of the orbit

c

spin angular momentum

d

orbital angular momentum

answer is A.

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Detailed Solution

Principal quantum number of an atom represents size of the orbit

The greater the number n, the farther the electron is from the nucleus, the bigger the size of the orbital, and the bigger the atom is because n indicates the most likely distance of the electrons from the nucleus.

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