Which quantum number indicates the size of the orbital?

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Question: Which quantum number indicates the size of the orbital?

Options:

Correct Answer: Principal quantum number

Solution:

The principal quantum number indicates the size and energy of the orbital.

Which quantum number indicates the size of the orbital?

Which quantum number indicates the size of the orbital?

Step 1: Understand that orbitals are regions in an atom where electrons are likely to be found.
Step 2: Learn about quantum numbers, which are numbers that describe the properties of these orbitals.
Step 3: Identify the principal quantum number, which is usually represented by the letter 'n'.
Step 4: Realize that the principal quantum number 'n' can take positive integer values (1, 2, 3, ...).
Step 5: Know that as 'n' increases, the size of the orbital also increases, meaning the electron is found further from the nucleus.
Step 6: Conclude that the principal quantum number is the one that indicates both the size and energy of the orbital.

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