Question

if two subshell have the same value of n+1 which shell will be filled first​

Answer 1

Explanation:

For subshells with the same value of (n+ℓ), electrons are assigned first to the subshell with lower n. A version of the aufbau principle known as the nuclear shell model is used to predict the configuration of protons and neutrons in an atomic nucleus.

Answer 2

thє suвcєllѕ wírh тнє sαmє vαluє σf (n+l) єlєtrσns αrє αssígnєd fírst tσ thє suвcєlls wíth lσwєr n.