Question

134. Which of the following statements is incorrect?
(a) The concepts of "penetration" and "shielding" are important in deciding the energetic
ordering of orbitals in multi-electron atoms
(6) A wave-function can have positive and negative values
(C) "Radial nodes" can appear in radial probability distribution functions
(d) The shape of an orbital is given by the principal quantum number.​

Answer 1

Explanation:

the function can have +ve or - ve values

Answer 2

(d)The shape of an orbital is given by the principal quantum number

Explanation:

shape of an orbital is given by azimuthal quantum number(l) wheareas energy and shape of orbital is given by principal quantum number (n)