URGENT PLZ HELP Which of the following statements is not true regarding the Quantum Mechanical Model?

a- Electrons exist is regions of probability known as orbitals.

b- Electrons exist outside of the nucleus.

c- Electrons exhibit particle-like behavior only.

d- Electrons possess a negative charge.

put the answers   and i could answer.

so here we go

atomic mass

239 + 1 = y + 134 + 3 combine like terms

240 = y + 137             subtract 137 from both terms

240 - 137 = y

103 = y

atomic number

94 = z +54 + 0

94 = z + 54               subtract 54 from both sides.

40 = z

answer

i think is conclusions.i think so