Question

how many protons does the element xenon have?
77
54
131
131.29

Explanation:

Step1: Recall atomic number property

The atomic number of an element is equal to the number of protons in its nucleus.

Step2: Identify Xenon's atomic number

From the periodic - table symbol, the number 54 above 'Xe' is the atomic number of Xenon.

Answer:

B. 54