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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