Answer
a) Carbon-13 isotope
b) Antoimony-121 isotope
Work Step by Step
a. ¹³₆C (Carbon-13 isotope)
Atomic Number (Z): 6
Mass Number (A): 13
Number of Protons: 6
Number of Neutrons: 13 − 6 = 7
Number of Electrons: 6 (assuming a neutral atom)
Element: Carbon
b. ¹²¹Sb (Antimony-121 isotope)
Atomic Number (Z): 51
Mass Number (A): 121
Number of Protons: 51
Number of Neutrons: 121 − 51 = 70
Number of Electrons: 51 (assuming a neutral atom)
Element: Antimony
