Question

question 9 radon 86 rn 222 radon has protons neutrons electrons

Explanation:

Step1: Identify atomic number and mass number

Atomic number = 86, mass number = 222.

Step2: Determine number of protons

The atomic number is equal to the number of protons. So, number of protons = 86.

Step3: Calculate number of neutrons

Number of neutrons = mass number - atomic number. So, number of neutrons = 222 - 86 = 136.

Step4: Determine number of electrons

In a neutral atom, number of electrons = number of protons. So, number of electrons = 86.

Answer:

Protons: 86
Neutrons: 136
Electrons: 86