Which of the following atomic numbers represent an element that is radioactive on the periodic table.

Taking into account the atomic numbers (and not specific isotopes of each element) this list contains the radiactive elements ir order of atomic number.

The atomic number is Z.

Tecnecium, Tc : Z = 43

Prometium, Pm: Z = 61

P olonium, Po: Z = 84

Astatine, At: Z = 85

Radon, Rn: Z = 86

Francium, Fr: Z = 87

Radium, Ra: Z = 88

Actinium Ac: Z = 89

Thorium, Th: Z = 90

Protactinium, Pa: Z = 91

Uranium, U: Z = 92

Neptunium, Np: Z = 93

Plutonium, Pu: Z = 94

Americium, Am: Z = 95

Curium, Cm: Z = 96

Berkelium, Bk: Z = 97

Californium, Cf: Z = 98

Einstenium, Es: Z = 99

Fermium, Fm: Z = 100

Mendelevium, Md: Z = 101

Nobelium, No: Z = 102

Lawrencium, Lr: Z = 103

Rutherfordium, Rf: Z = 104

Dubnium, Db: Z = 105

Seaborgium, Sg: Z = 106

Bhorium, Bh: Z = 107

Hassium, Hs: Z = 108

Meitnerium, Mt: Z = 109

Darmstadium, Ds: Z = 110

Roentgenium, Rg: Z = 111

Copernicium, Cn: Z = 112

Nihonium, Nh: Z = 113

Flerovium, Fl: Z = 114

Moscovium, Mc: Z = 115

Livermorium, Lv: Z = 116

Tennessine, Ts: Z = 117

Oganesson, Og: Z = 118

Remeber, other elements, although are not radiactive, do have radiactive isotopes.