Respuesta :

The isotope notation : ⁷³₅₃X

Further explanation

Given

53 protons and 20 neutron

Required

The isotope notation

Solution

Isotopes are elements that have the same atomic number with a different mass number

The following element notation,

[tex]\large {{{A} \atop {Z}} \right X}[/tex]

X = symbol of element

A = mass number

   = number of protons + number of neutrons

Z = atomic number

   = number of protons = number of electrons, on neutral elements

So the mass number of element = 53 + 20 = 73

Atomic number = 53

The symbol :

[tex]\large {{{73} \atop {53}} \right X}[/tex]