Final answer:
The total number of electrons in the given subshells are 5 p electrons in N, 2 s electrons in Si, and 4 d electrons in S.
Step-by-step explanation:
To determine the number of electrons in each subshell, we need to look at the electron configuration.
(a) For N (Z = 7), the electron configuration is 1s²2s²2p³. So, there are a total of 5 p electrons.
(b) For Si (Z = 14), the electron configuration is 1s²2s²2p63s²3p². So, there are a total of 2 s electrons.
(c) For S (Z = 16), the electron configuration is 1s²2s²2p63s²3p⁴. So, there are a total of 4 d electrons.