Which of the following statements is correct

Options

A. The concepts of “penetration” and “shielding" are important in deciding the energetic ordering or orbitals in multi-electron atoms
B. A wave-function can have positive and negative values
C. “Radial nodes” can appear in radial probability distribution functions
D. The absolute size of an orbital is given by the principal quantum number.

Answer

A, B, C

Explanation

m will have `pm` values