How many neutrons are there in an atom of 60ni? a) 60 b) 30 c) 28 d) 32 e) 29

d) 32

Explanation:

Nickel has atomic number 28, so its nucleus contains 28 protons

no. of protons + no. of neutrons = mass number

                                            p + n = M

                                         28 + n = 60

                                                  n = 60 - 28 = 32

There are 32 neutrons in an atom of Ni-60.

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