Question

number of valency electron of 1s^2 2s^2 2p^3​

Answer 1

Answer:

Phosphorus has electron configuration, 1s²2s²2p63s²3p³. The highest-numbered shell is the third shell (3s²3p³): 2 electrons in the 3s subshell and 3 electrons in the 3p subshell. That gives a total of 5 valence electrons.

Step-by-step explanation:

above is your answer

hope it will help u

Answer 2

Answer:

3 is the number of Valence electron.