Which characteristic is given by the principal quantum number? orbital size orbital mass orbital shape orbital orientation

The answer is: orbital size.

The principal quantum number (n) is one of four quantum numbers which are assigned to each electron in an atom to describe that electron's state, n=1,2,3...

The principal quantum number shows the most probable distance of the electrons from the nucleus.

For example, tellurium (Te) is in group 16 (chalcogens) and period 5 (principal quantum number n = 5, which means it has 5 electrons shell) of Periodic table.

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