question 7\n54\nxe\nxenón\n131.29\nxenon has\nprotons\nneutrons\nelectrons

Answer

Explanation:

Step1: Recall atomic number property

The atomic number is equal to the number of protons. For Xe, atomic number is 54, so number of protons = 54.

Step2: Recall mass - number and neutron - proton relation

The average atomic mass of Xe is approximately 131.29. Rounding to 131. Mass number = protons + neutrons. So neutrons = mass number - protons = 131 - 54 = 77.

Step3: Recall charge - neutral atom property

In a neutral atom, number of electrons = number of protons. So number of electrons = 54.

Answer:

Protons: 54 Neutrons: 77 Electrons: 54