One isotope of nitrogen has 7 protons and 8 neutrons. Which is the correct reference for this isotope?

A.
nitrogen-1

B.
nitrogen-15

C.
nitrogen-8

D.
nitrogen-7

Question

One isotope of nitrogen has 7 protons and 8 neutrons. Which is the correct reference for this isotope?	
 
 A.
nitrogen-1
 
 B.
nitrogen-15
 
 C.
nitrogen-8
 
 D.
nitrogen-7

cuanchi · Answer

B.
nitrogen-15
 you have to said what is the mass of the isotope. The mass is equal to the sum of protons+ neutrons. 7+8

other example carbon-14, carbon-12
14 and 12 are the mass of these two different isotopes of carbon