The species __________ contains 16 neutrons.

a. 16O
b. 31P
c. 34S2-
d. 80Br-
e. 36Cl

The answer is b. 31P

Yeah, it's B. 31P

Thanks!

16 O

To determine which species contains 16 neutrons, we need to look at the atomic number and the mass number of each species.

The atomic number represents the number of protons in an atom, while the mass number represents the total number of protons and neutrons.

We need to determine which species has a mass number that is 16 more than its atomic number, which would indicate that it contains 16 neutrons.

Let's analyze each option:

a. 16O: The atomic number of oxygen is 8, so the mass number would be 8 + 16 = 24. Therefore, 16O does not have 16 neutrons.

b. 31P: The atomic number of phosphorus is 15, so the mass number would be 15 + 16 = 31. Therefore, 31P does not have 16 neutrons.

c. 34S2-: The atomic number of sulfur is 16, so the mass number would be 16 + 16 = 32. However, the "-2" charge indicates the presence of two extra electrons, which do not contribute to the mass number. Therefore, 34S2- does not have 16 neutrons.

d. 80Br-: The atomic number of bromine is 35, so the mass number would be 35 + 16 = 51. However, the "-1" charge indicates the presence of an extra electron, which does not contribute to the mass number. Therefore, 80Br- does not have 16 neutrons.

e. 36Cl: The atomic number of chlorine is 17, so the mass number would be 17 + 16 = 33. Therefore, 36Cl does not have 16 neutrons.

After analyzing all the options, none of them have 16 neutrons. None of the given species fits the criteria.