Question

Select all characteristics that apply to an atomic orbital: __ Defined by the square of the wave function __ identified by a unique combination of three quantum numbers __ defined by the wave function __ a region around the nucleus of an atom where the probability of finding an electron is high __ a shell in an atom containing valence electrons __ indentified by a unique combination of four quantum numbers

Answer 1

The square of the wave function denotes the probability of particle at at a given point and time.
But it does not denote atomic orbital.
The 2^nd statement is true. (n_i,l_i,m_i) only specify the particular orbital
Third one is also true it is defined by  Ψ
4 ^th statement is true , that's the basic definition of an atomic orbital
5^th statementis false, shell is a part of atomic orbital and it does not matter whether it has valence
electrons or not , it still will be an atomic orbital
last statement is false, the last spin quantum number will not help in identifying an atomic orbital