Question #0137b

1 Answer
May 9, 2017

Atomic number 15 1s22s22p63s23p3

Explanation:

Phosphorus number 15 is a very unstable element. It has five valance electrons. 10 electrons are in the filled second shell leaving five valance electrons. the 3s23p3

Phosphorus can lose electrons giving a charge of +3 and +5.
Phosphorus can also gain electrons achieving a charge of -3

So the electron configuration is

1s22s22p63s23p3