State the number of neutrons in an atom of each of the following isotopes: n (mass number 15) and ni (mass number 58)

:

Atomic number of Nitrogen-15= Number of protons = 7

Mass number = Number of protons + Number of neutrons = 15

Number of neutrons = 15 - 7 = 8

:

Atomic number of Nickel-58= Number of protons = 28

Mass number = Number of protons + Number of neutrons = 58

Number of neutrons = 58 - 28 = 30

The number of neutrons in N-15 is 8 and in Ni-58 is 30

i can ! i just need to know what the paragraph is! : p

i believe you are right for all except the 3rd ( look at sqdancefan his answer is much better)