What is the difference between a 3s orbital and a 2s orbital? the 3s orbital is

Question

What is the difference between a 3s orbital and a 2s orbital? the 3s orbital is larger than the 2s orbital. the 3s orbital can hold more electrons than the 2s orbital. the 3s orbital has a different shape than the 2s orbital. the 3s orbital has a different orientation in space than the 2s orbital. the phrase "ground state electron configuration" means only one excited state has electrons. electrons must be unpaired. all electrons must be paired. the lowest energy state of an atom. There are two ways of placing 3 electrons into p orbitals: or the preferred way is with all three electrons unpaired. This is an example of the Pauli Exclusion Principle.

Explanation / Answer

18) As the shell number (or) principal quantum number increases, size of the orbital increases.

   Therefore,

   size of 3s orbital is larger than 2s orbital.

Ans = a

19)   ans = d

   Ground state electron configuration means , the lowest energy state of atom.

20) ans = Hund's rule

   Hunds rule state that every orbital in a subshell should be singly occupied with one electron before any one orbital is doubly occupied.

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