Question

Write the full atomic symbol for each isotope:

(a) 8 protons, 9 neutrons
(b) Atomic number 50, mass number 119
(c) 12 neutrons, atomic number 11
(d) 28 protons, mass number 58
(e) 81 neutrons, symbol Ba

Answer 1

a) Oxygen-17

b) Tin-119

c) Sodium-23

d) Nickel-58

e) Barium-137