fill in the numbers to interpret the isotope symbols.\n$_{92}u^{238}$ has protons, neutrons, and…

Explanation:

Step1: Recall atomic number property

The sub - script in an isotope symbol is the atomic number, which is equal to the number of protons and also the number of electrons in a neutral atom. For $_{92}U^{238}$, the atomic number is 92, so the number of protons and electrons is 92.

Step2: Calculate number of neutrons

The mass number (superscript) is the sum of protons and neutrons. For $_{92}U^{238}$, mass number $A = 238$ and atomic number $Z=92$. Neutrons $n=A - Z=238 - 92 = 146$.

Step3: Apply to $_{86}Rn^{222}$

For $_{86}Rn^{222}$, the atomic number is 86, so the number of protons and electrons is 86. The number of neutrons $n = 222-86=136$.

Answer:

${92}U^{238}$: 92 protons, 146 neutrons, 92 electrons ${86}Rn^{222}$: 86 protons, 136 neutrons, 86 electrons