The Lewis structure of P₄ is shown in 3-D form. The two bottom corner P atoms are facing right in front of us, one P atom behind the two, and one P above it. Each line represents 2 electrons. When you add the lone electrons, you get a total of 20 valence electrons.
Formal charge of each P: 5 - (2 +1/2*6) = 0
I think its the mass that changes but im not sure
The region where an electron is most likely to be located is known as the electron cloud.
After careful consideration your answer is...
Leucippus and Democritus
*Hope I helped*
~Alanna~