An atom has 16 protons, 16 electrons, and 18 neutrons. This atom has
A.
an atomic number of 32
B.
a mass number of 34
C.
a mass number of 32
D.
an atomic number of 34

Elias is almost correct. he just got it backwards.the correct answer is that it demonstrates elastic potential energy transforming into kinetic energy.

The problem here is that according to aufbau principle before 3d orbital 4s subshell comes.after filling 3p orbital with electrons you have 4 electrons left, you place two in 4s with opposite spin and the other two in 3d in any of its two orbitals of total five orbitals with the same spin.

Isec i will do it and them i will let you know