Select the choice in which atomic number, mass number, number of neutrons, and number of protons listed is correct for phosphorous-32.
A)a
B)b
C)c
D)d

Question

Select the choice in which atomic number, mass number, number of neutrons, and number of protons listed is correct for phosphorous-32. 
A)a 
B)b 
C)c 
D)d

Quizplus · Accepted Answer

Phosphorous-32 has an atomic number of 15, which means it has 15 protons in its nucleus. The mass number is 32, which means it has a total of 32 particles in its nucleus (protons and neutrons combined). To find the number of neutrons, we simply subtract the atomic number from the mass number: 
32 - 15 = 17 neutrons
Therefore, in choice B, the atomic number is 15, the mass number is 32, and the number of protons is 15 while the number of neutrons is 17.

Select the Choice in Which Atomic Number, Mass Number, Number