Respuesta :

Uranium with an atomic mass number of 238 indicates that it is highly unstable and radioactive. This is because its original number of neutrons is only 92, giving it 146 more neutrons than the usual. These isotopes are usually given symbols denoted by the element-"atomic mass". This means a symbol for this isotope is Uranium-238 or ^238U.

Answer: [tex]_{92}^{238}\textrm{U}[/tex]

Explanation:

Isotopes are atoms of same element which have same atomic number but different mass number.

General representation of an element is given as:   [tex]_Z^A\textrm{X}[/tex]

where,

Z represents Atomic number

A represents Mass number

X represents the symbol of an element

General representation of an isotope of ursium with atomic number of 92 and mass umber of 238 and represented by the symbol U is:

[tex]_{92}^{238}\textrm{U}[/tex]

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