How many protons are there in the following atom? 235 92 u
235
143
317
92

The number of protons in given isotope are 92.

Explanation:

The general representation of an isotope is given as

where,

Z = atomic number

A = atomic mass

X = symbol of an element

We are given:

Isotope =

Atomic number is defined as the number of protons or number of electrons present in an element. Here atomic number is 92.

Thus, Number of protons in given isotope of uranium = 92

r just means there's a number of carbon in teh chain. for example rcooh means that after x number of carbon, the chain ends with cooh.

explanation: