Question

The mass number of an isotope of uranium is 238, and its atomic number is 92. Which symbol best represents this isotope of uranium?

Answer 1

Answer: The isotope will be represented  by symbol $^{238}_{92}U$ .

Solution:

The isotope of an element is represented by:

$^{A}_{Z}X$

X = Symbol of an element

Z = Atomic Number of that element = Total number of electrons or protons

A = atomic mass of that element = Z+ total number of neutrons

So the uranium isotope with atomic mass of 238 and atomic number of 92 will be written as:

$^{238}_{92}U$

Answer 2

$238_{U}$



That is a capital U with the number 238 at upper left of the letter