A specific, electrically neutral atom of boron contains a total of 16 particles (protons, neutrons, and electrons). What is the mass number of this atom of boron?

A: 5
B: 6
C: 11
D: 21

answer; i believe the correct answer is (c) /// is a homogeneous mixture of gaseous substance nitrogen,oxygen and smaller amounts of other substancesmixtures can be either ( homogeneous or heterogeneous)plz check first good luck

answerca air mass;