Question

For each of the following isotopes:
determine the number of protons, neutrons, and electrons in a neutral atom of the isotope
a) 14
     8 O

b) 70
    29 Cu

c) 175
     73 Ta

d) 217
     87 Fr

Answer 1

a)

Here:

atomic number = 8

mass number = 14

So,

number of proton = atomic number = 8

number of electron = atomic number = 8

number of neutron = mass number - atomic number = 14 - 8 = 6

b)

Here:

atomic number = 29

mass number = 70

So,

number of proton = atomic number = 29

number of electron = atomic number = 29

number of neutron = mass number - atomic number = 70 - 29 = 41

c)

Here:

atomic number = 73

mass number = 175

So,

number of proton = atomic number = 73

number of electron = atomic number = 73

number of neutron = mass number - atomic number = 175 - 73 = 102

d)

Here:

atomic number = 87

mass number = 217

So,

number of proton = atomic number = 87

number of electron = atomic number = 217

number of neutron = mass number - atomic number = 217 - 87 = 130