# compared to 31P, the radioactive isotope 32P has what?

Compared to 31P the radioactive isotope 32P has

P-31 has 15 Protons ( atomic Number = 15 ) and 16 Neutrons in Nucleus and 15 Electrons in Atom ; 0 Charge

P-32 has 15 Protons ( atomic Number = 15 ) and 17 Neutrons in Nucleus and 15 Electrons in Atom ; 0 Charge

The answer will be —> d) one more Neutron

Question: if the mass number equals the number of protons + neutrons, how do you know if the difference in the radioactive isotope 31p as compared to radioactive isotope 32p is the difference in protons or neutrons? The atomic number is supposed to be on the bottom on the left of the element. It is supposed to be the number of protons. If I don’t have the atomic number, how do I tell if the difference in the two numbers is neutrons or protons?

d) one more neutron.

Both P-31 and P-32 have 15 protons, which is the atomic number of P. The different mass numbers are due to different numbers of neutrons. P-31 has 16 neutrons and P-32 has 17 neutrons.

It has one more electron

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